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-NEWS ON MINERALS - 1 - Vol 27 - 161 - 2012

NEWS ON MINERALS Vol. 27 , No 161 , September – October 2012

27 , 161 , - 2012

15€ - Price of each issue 15 €

- HELLAS - PIRAEUS ISSN 1011-5870


(10 8 6 .- cms , 189 - grams) ( 8 X 9 X 5 cms – . , 168 –grams)

( ) Jalgaon, Maharashtra State,

Apophyllite crystals , Poona , India – Poona ( 313 – grams , 9 X 7 X 6 cms – . )

Alexandra G. Minatidou

–NEWS ON MINERALS GeMin . The Inspirer and the Soul of ORYKTOLOGIKA NEA -NEWS ON MINERALS and GeMin Expo in GREECE


ORYKTOLOGIKA NEA NEWS ON MINERALS

ISSN 1011-5870 1986

Established in January 1986)

Editor and Owner : Dimitris G. Minatidis , M. Sc. , AGCC

Geologist-Geochemist Leof. Gr. Lambraki 70 ,

Piraeus EL-185 32 , HELLAS Tel Mobile : +30- 6979771898 Tel. Land : +30-213-025-8688

FAX :+ 30-210-4132-570 e-mail : [email protected] ,

[email protected] Web : www.gemin.eu

Subscription – :

1 year 90 EURO - 2 years 180 EURO (ONLY Air Mail Subscriptions)

Previous volumes: 1-14 (years 1986– 1999) in paper form , 80 EURO/volume Vol. 15-26 (Years 2000-2011) , available in CD at 400 Euro/CD

Payment by Wire transfer to : D. Minatidis Account number : IBAN GR840 840 1050 0000 05505505486 CITI BANK ,

Swift Code : CITIGRAA Piraeus Branch , Dimotiko Theatro ,

Korai Square , Piraeus , Hellas

Circulation in 25 Countries around the World.

Advertisement* (Prices per Insertion per issue)

COLOR BLACK & WHITE Size Prices in EURO A4 300 150 A4/2 180 100 A4/4 100 75

– 2nd Page : 500 Euro

– Back Cover : 400 Euro - All advertisements are prepaid.

*European Union residents add 23 % V. A .T . on total value.

ORYKTOLOGIKA NEA -NEWS ON MINERALS

sponsor the GeMin International Mineral , Gemstone , Jewellery and Fossil Exhibition held every year in Hellas since 1987.

-

- NEWS ON MINERALS

- Opinions expressed by the authors do not necessarily represent opinion of ORYKTOLOGIKA

NEA -NEWS ON MINERALS

/Mineral in Cover

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(6 3 2 . – cms)

Beautiful azurite + malachite specimen from Lavrion , Attiki Co , Hellas .

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NEWS ON MINERALS GeMin ,

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. The Summer is over and some friends collectors have notified this periodical publication on “peculiar” rocks and fossils they found in various places during their summer vacation.With great joy and in cooperation with these friends we proceeded to a reconnaissance of the material they collected and we present it in this issue what they have found and sent to us along with an excellent article on Geowonders in Pindos Mountain and Development in Grevena area based mainly on Geotourism. The material of the collectors comes from Katara area in Trikala, Kalamos area in NE Attiki Co. , Volos area in Magnesia Co. and Pendeli Mt. in Attiki Co. The findings of friends-collectors may not be “diamonds” , but we consider them to be “diamonds” in sense that their findings are discoveries by people who retain a remarkable observation in the field and are characterized by a passion in this hobby. Their description , even in simple form, may lead the road to other collectors and Nature passionate to visit the areas and –who knows- locate new findings. From January 1986 , when this consistent effort on ORYKTOLOGIKA NEA-NEWS ON MINERALS and GeMin Expo started , we supported and we still support the belief that every County in Hellas either in Mainland or the Hellenic Islands in Aegean , Ionian and Libyan Sea , have a mineral wealth – in a wider meaning of this term. This Mineral Wealth can be developed and we refer to “the other way” of the development of mineral wealth : To offer knowledge . The readers will have the chance again to realize that this type of sustainable development of the Mineral Wealth in this Country can contribute “a lot” in economy without environmental problems.

Dimitris G. Minatidis


EXCELLENT MINERAL SPECIMENS FOR SYSTEMATIC MINERALOGY

Lot of 48 Faden Quartz crystals from Wana , Waziristan , Pakistan.

Lot of 25 crystals and Colombian amber. The crystals include Almandine garnets from India , emerald

green octahedric fluorite and Kallaite (turquoise ) from China. All specimens in various lots are in plastic boxes properly labeled – Excellent material for resellers and

collectors.


, . 6976678718 , e-mail : [email protected]

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Fossils in Trikala County , Thessalia , Central Hellas

During the opening of a path in a forest area in Pindos Mt. in the area centered in Katara of Trikala close to Malakasi village , an interesting fossil deposit was discovered. The fossil deposit is in the locality “Kampos tou Despoti” or in excact English translation “Plain of the Bishop”. Marine fossils in an altitude of 1800 meters revealed a sea which was so well hidden up there. A sign saying “Attention – Bears” reminded to us that we were in the Mountain and we had to respect the Laws of Mountain. We collected some fossils and we left living a great experience on “Fossil Safari” in Pindos Mountain. Some of the collected fossils are seen in the photographs in next page.Gastropods and various mollusks (shellfish) were there.


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Image of a mollusc fossil or Bivalve (clamed-up)

-NEWS ON MINERALS - 8 - Vol 27 - 161 - 2012 - From Australia : – Opal Book

A lovely book on Opal, South Australia s Gemstone is available for 22 Australian dollars , plus postage and handling costs (around 10 AUS $ per book for Sea Mail or AUS $ 16 per book for Economy Air Mail). This is a publication of the South Australian Department of Mines and Energy. Size of the book 15 cms X 21 cms, 177 pages full of color photos and maps. (Edition 1992) This is a book written by people who live and work in the heart of the largest Opal Fields in the world , “speaks” to you and tells you all about Opal : What is Opal ? Geology of Opal ,mining methods in the Opal Fields of Andamooka , Coober Pedy Mintabie ,The Opal Industry , Opal mining and the Law, Glossary of Opal , mining terms , selected bibliography and much more. This is some of the information inside this book on one of the most beautiful gemstones : O p a l How to order in Europe: ORYKTOLOGIKA NEA-NEWS ON MINERALS have been assigned as Official Distributor in Europe for the book : Opal, South Australia s Gemstone. European orders will be forwarded to : Dimitris G. Minatidis, c/o ORYKTOLOGIKA NEA-NEWS ON MINERALS , 70 Gr. Lambraki Av. (Formerly Queen Sofia Avenue ) , Piraeus EL-185 32 , Hellas. Tel. Intern. : +30-213-025-8688, FAX : +30-210- 4132-570 , E-mail : [email protected]. Payment will be sent-on receipt of Pro-Forma Invoice directly to: Department of Mines and Energy ( Attention : The Editor , P. O. Box 151 , Eastwood , South Australia 5063 , Australia . Tel (08)-274-7500 , FAX : (08)-2727-597. [email protected]

-NEWS ON MINERALS

: , . 22 + 10

16 . : - NEWS ON MINERALS , .

70 , 185 32 , (213)-025-8688 , FAX: (210)- 4132-570 e-mail : [email protected] . – - : Department of Mines and Energy , P. O. Box 151 ,

Eastwood , South Australia 5063 , Australia (Attention: The Editor). Tel.(08)-274-7500 , FAX: (08)-2727-597 . [email protected]

-GEOMARKET- -GEOMARKET- - MINERAL SPECIMENS

- Superb azurite and malachite specimens from Lavrion , Hellas in sizes from T/N to Museum Specimens in prices from 15 Euro upwards. Nature has created some of the best azurite and malachite specimens on Earth in the classic European locality , Lavrion in Hellas. - Slag specimens , Lavrion , Hellas. Slag specimens 3000-5000 years old with vugs filled with minerals in small perfect crystals. 15 EURO each. Minimum 10 slags. * Also nice mineral specimens from Lavrion for collectors from 15 € (T/N size) each ( baryte, fluorite , smithsonite , malachite. dog-teeth ankerite and other species). * Double terminated black tourmaline and dravite crystals from 5 € each. ** Please add for postage and handling , depending on the weight of the specimens and the way of shipment (Air or Surface Mail) . --- European Union ( ) Residents add 23 % V.A.T. on total cost.

OPAL IN STAMPS –

,1973 , 1995

, 1998

-NEWS ON MINERALS - 9 - Vol 27 - 161 - 2012 ( ) -MINERAL POSTCARDS (LAMINATED)

set of 12 color high quality mineral postcards depicting the following mineral specimens from various localities around the world : 1. Sapphire 2. Ruby 3. Emerald (Facetted) 4 . Pyromorphite 5. Pyrrhotite on Calcite 6. Rhodochrosite + aegirine + genthelvite 7. Cubanite xls 8. Pyrite crystals 9. Quartz , variety , amethyst- sceptre habit 10. Serandite 11. Diopside on grossular 12. Amethyst 13. Gypse Price 40 EURO Air Mail post paid.

CD-ROMs on Earth Science- CD-ROMs * The Theory of Plate Tectonics 75 € * Illustrated Dictionary of Earth Sciences 50 € * The Wonders of Rocks and Minerals 75 € * The study of minerals 90 € * Plate Tectonics and how the Earth works 75 € * Life in Amber 85 € * The Photo-Atlas of minerals 95 € * Hands-On Mineral Identification 40 € (European Union Residents add 23 % V.A.T.)

GEMSTONES AND MINERALS -

(T/N size) (miniature size) , . -Ask to see the collections of minerals for Systematic Mineralogy in which every specimen either in T/N size or in miniature size is in plastic box labeled with name of mineral and its origin. -For fine mineral specimens visit http://www.gemin.eu –

http://www.gemin.eu

- SHOWS – –SHOWS – 2012

Exploring the wonder of the Earth's mineral treasures through collecting, preparing and sharing of mineral specimens , gemstones and Fossils.

06.09.2012 - 08.09.2012 , Mineralien-Edelsteinevent St. Gallen , Helvetia . International fair for minerals and

gems , Fair organizer: Lips-Event , Zürcher Str. 199 , 9014 St. Gallen, Helvetia . Tel: +41 (0)79 8911352 [email protected] , www.lipsevents.ch

7-9 September , Toledo , Ohio ,USA . Info : Suzanne Shimatzki, 107 Florentine Dr., Holland, OH 43528, (419) 861-0147; e-mail: [email protected] ; Web site: www.rockyreader.com

15-16 September , Cremona , Italy . Info : ITIS J. Torriani, Via Seminario. Beurs (MM). [email protected] , www.gmc-cr.it

21-23 September , Moss , Norway . Info : [email protected] , www.mossemessa.no 22-23 September , Hannover , Germany . Info : Congress Centrum. [email protected] , www.hcc.de 22-23 September , Bratislava , Slovakia . Info : Dom kultúry Cultus, Ružinovska 28. [email protected] 29-30 September , NÜRNBERG , Germany . Info : Meistersingerhalle. [email protected] ,

www.mineralienlaube.com 30 September , DOMODOSSOLA , Italy . Dopolavoro Ferroviario (bij het station). Info : [email protected] 3-7 October , TORINO , Italy. Polo Fieristico Lingotto Fiere, 1° Padiglione Lingotto, Via Nizza 294. Info :

[email protected] , www.euromineralexpo.it 6 October 2012: Autumn Mineralfest - Macungie, Pennsylvania , USA . Information : http://www.mineralfest.com/ 6-7 October , BUDAPEST Hungary . Millenáris Fogado, Feny u. 20. Info : [email protected] ,www.asvanyborze.eu 6-7 October , VÄSTERÅS , Sweden . Quick Net Arena (vroeger Friidrottshallen), Kungsängsgatan 8. Info :

[email protected] , www.vags.org/show.shtml 6-7 October , GENEVE , Helvetia . Event-Center, La Praille. Beurs (M-F-E). Info : www.svsmf.ch 13-14 October , THIONVILLE (57) , France . Salle Jean Burger (achter theater). Info :

[email protected] , www.geolor-thionville.fr 20-21 October 2012: Rochester, New York , USA . Information : http://www.rasny.org/show/ Mineral and Gem show , München , Germany , 26 - 28 October 2012 , Information : http://mineralientage.de/ 27 October 2012: Ultraviolation - Fairless Hills, Pennsylvania , USA . ONLY for Fluorescent Minerals !! . Information

: Chuck O’Loughlin , 130 Maple Terrace, Merchantville, NJ 08109-5010 856-663-1383 [email protected] Greece - Athens : 26th GeMin 2012 , 23-24-25 November 2012 . Information : GeMin, c/o ORYKTOLOGIKA NEA -

NEWS ON MINERALS ,Gr. Lambraki 70 , Piraeus, EL-18532, Hellas. Tel+30-213-025-8688 , FAX:+30-210-4132-570 , e-mail : [email protected] , http://www.gemin.eu

Verona Mineral Show , Italy : 7-8-9 December 2012 . Information : http://www.veronamineralshow.com/component/option,com_frontpage/Itemid,1/lang,en/

31 January - 17 February 2013: Tucson 22nd Street Show - Tucson, Arizona , USA . Information : http://www.22ndstreetshow.com/

Bologna Mineral Show , Italy : 08-09-10/03/2013 . Information : http://www.bolognamineralshow.com/indexeng.php

DO YOU ORGANIZE AN EARTH SCIENCES EVENT ? JUST LET US KNOW TO INCLUDE IT IN THE CALENDAR OF SHOWS


[email protected] BA Rice University, Texas, PhD University of California

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-NEWS ON MINERALS - 12 - Vol 27 - 161 - 2012 DEVELOPMENT IN GREVENA

[email protected] Dr Annie Rassios

Nowhere in Greece does the economic crisis affect us more than here in Grevena and the mountainous regions of the Pindos. We suffer the highest unemployment in the country; the “way of life” that sustained generations before us is now marginalized within the Europe of today. We know we live in “o omorpho topo”. Can the beautiful Grevena and Pindos develop as an economically attractive place to live and raise our families? Development costs money – or does it? Greece, including Grevena, possesses mineral resources. Development of these is possible, but profits can only be considered on a long-term, multi decade, scale. The cost of opening a mine or quarry is enormous. To re-open the old Skoumtsa-Xerolivado mine would take an investment on the order of a half billion euros as a start, with no guarantee that the metals market would support this venture profitably now or in the future. There are indeed companies willing to invest in opening or reopening mines in Greece including here locally: these are bogged down in insurmountable bureaucracy, lack of technologic infrastructure, and in some places, as for the example of gold in Chalkidiki, important choices must be made between the environment and the mine. Would you sell Valia Kalda to open a quarry for industrial minerals? Green energy generation in the Pindos region is slapdash and reduces the potential for touristic development. The small electric dam at the Tsouriakas waterfall was unstoppable despite local opposition. The economic development granted by the small amount of electrical generation apparently was considered superior to development of Tsouriakas as an international touristic destination. As residents of Grevena, are we benefitting from this development? I don’t know how much the dam and electrical facilities are costing, but I do know that touristic development would cost nearly nothing aside from marketing. The last time I visited a small electric dam site on Loumnitsa River on the border of Valia Kalda, it was filled with rocks washed down the stream and fallen from rockslides that closed its access roads. More than its investment money wasted, the development of the Loumnitsa as a world-class trout fishing stream is now out of the question. Wind farms are a great investment in development – but are they great for us in the Pindos? Go to Austria: every farmer’s field seems covered by wind machines. But the mountains are kept clear because otherwise tourists would stop spending money there. It seems as if a wind farm above Avdella and Perivoli might help these villages have cheaper electricity – or is this electricity to be added to the national grid, thus causing unsightly pylons to be erected cutting across some of the most beautiful terrain in Greece, and reducing the potential development of the region as a major international touristic destination? Would you trade the few remaining Golden Eagles of the Pindos for a wind farm to provide air conditioning to one or two buildings in Athens? We need development. We need development that helps us directly in the Pindos. We need it now. And frankly, it can’t cost much money because “there ain’t spit” available. For the last several years, I have been working on development of Geotourism in the Pindos. Geotourism is based, simply, on visiting absolutely beautiful mountains and countryside, much alike to National Park tourism in the USA and Europe. We can produce books scientists will love, and we can produce books and pamphlets that the general tourist will appreciate. We are doing both, with as much success as constant battles with bureaucracy allow. Geo- and mountain tourism are as advanced in Greece as tourism at the Grand Canyon was about a hundred years ago. In those days, this meant finding a guide, finding rough roads and trails, hoping to find a refuge to sleep at. Today, it goes without saying that tourism at the Grand Canyon is a multi-billion dollar business. Most National Parks in the USA require the tourist to make a reservation a year in advance of their visit. Oh, don’t we wish we had a touristic business like that here in the Pindos? In 2009, the year before the Great Greek Economic Catastrophe, there were about 300,000 Greek tourists actually touring Greece: ~3000, just 1%, visited Grevena. With the present economy, this number is going to be lower and lower with each new budgeting measure passed by the government. Like all businesses in our area, local tour companies are down ~60%, and hostels, hotels, and tavernas even more. Greek tourists simply do not have money to spend at present visiting our mountains: we cannot fill our hotels and restaurants with Greek tourists. Even now during the global recession, 14.5 million foreign tourists came to Greece last year, and more are predicted for this year. Half a million international tourists come to visit nearby Meteora yearly. How do we bring some of these folk our way? Which brings me back to the books we’re writing. These are public relations books – they are meant to bring the attention both of international scientific and general tourism. Scientific tourism is great – a week-long field tour among university professors and academics brings in about 50,000 euros to the local economy. This is good, but it’s only possible once or twice a year. The international academic community can only field a certain number of scientists interested in the regional geology. And it has to be organized by specialists, fellow scientists with the academic credentials to legitimize the field trip. International tourist groups are far more realistic and profitable. Today, specialized tours sponsored by college and university alumnae groups cross all of Europe with excursions such as: “Italy’s Magnificent Lake Country,” “Grand Danube Passage,” “The Villages and Vineyards of France,” “Greek Islands”… They’re already in Greece. How do we get them HERE? Can the GeoWonders of the Pindos compete? Within the text of this small article I’ve used the description “world class” several times. I’ve been to every National Park in the western USA. I’ve been to Switzerland, to Scotland, to France, to the Danube. I’ve even been to the Greek islands. But I chose to live in Grevena. We have potential world-class touristic destinations throughout the Pindos, in particular, “Geowonder” attractions based on the spectacular natural landscapes. These Geowonders host the added values of our traditional Pindos way of life, with churches and monasteries that date from Byzantium.

-NEWS ON MINERALS - 13 - Vol 27 - 161 - 2012 We host one of the world’s most rare ecosystems; ours is a wilderness area alive and well within Europe. Did you know the oldest rocks in Greece can be visited in Grevena? Did you know that we can show you the birthplace of the European continent? Bears! Wolves! Mushrooms! We got it! We are an international destination, undiscovered as yet by tourists. We have the infrastructure – we have the roads, hotels and hostels, tavernas, and tour companies. We have the “product” we want to sell; the magnificent Pindos itself. In our case, what’s lacking is marketing. To market, you must be able to show the product to potential buyers. And you must show it to the right market of potential buyers. In the case of international tourism, this means books, booklets, websites in English, French, German and Chinese. This means that people like me and a few others send information to over a thousand alumnae groups and travel clubs over the globe. It costs us time, not much money. We’re trying. We’ve surveyed more than 60 “Geowonders of the Pindos” localities, and are ready to place them in a low-cost book to aid touristic marketing. But again, up comes the labyrinth of Greek bureaucracy and our attempts to bring low-cost development into the area has bogged down. Here are the numbers I want to communicate: Were six alumnae groups per year to take part in a “Geowonders of the Pindos” tour, with a lot of time spent in the Grevena area, the contribution to the local economy would be about half a million euros per year. Maybe putting in a mine could bring more money in the long long term, but for now, Geotouristic development – the “sale” of “o ormorpho topo” on an international scale – can be the cheapest, easiest path to economic recovery in the Pindos area.

View of Smolikas from the Annitsa War Memorial: Smolikas itself is from a suite of "near-moho" peridotite that

contains a lot of gabbroic intrusions. Rocks in foreground are Pindos flysch.

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Beyond the scientific knowledge these books can offer , they are at the same

time diachronic valuable tools for economic

development

(Covers courtesy : Dr.Ann Ewing Rassios,Ph.D.)


Some of our "flower" texture chrome ores from just below Chromite Ores (photo by Ann Ewing Rassios) are the "petrologic" moho at Vourinos. "shaped" by the subsolidus growth of olivine around them and emerging through the ore layers.

Flinga - Mavrovouni : is a suite of lovely lherzolites in which you can see melting phenomena, that is, you can see

where magma was being produced in the mantle.

How the World was before 230 million years – 230


Cretaceous folds: This Geowonder is a formation of Inside Aetoraches Chrome Mine (photo by D. Ghikas) Cretaceous Limestone caught at the edge of the shows what you can see in an otherwise abandoned Mesohellenic trough and highly deformed mine tunnel.

Deformed limestone from Zavordas : This limestone was caught between two moving tectonic plates and so "squeezed" between them as to flow like molasses.

It is exposed in the river bed, and will shortly be at the bottom of the new lake behind the dam at Ilarionas.

-NEWS ON MINERALS - 17 - Vol 27 - 161 - 2012 SLAG MINERALS – *

Hellas + South Africa + Germany : (International Association of Collectors of Slag Minerals - IACSM - Founded in 1986 by NEA-NEWS ON MINERALS).

+ + : Join the International Association of Collectors of Slag Minerals and keep informed with Slag Mineralogy , Slag Minerals and Collectors of Slag minerals from around the World. You can write either:

- NEWS ON MINERALS , Leof. Gr. Lambraki 70 , Piraeus EL -185 32 , Hellas. Telefone International : +30-213-025-8688 , FAX:+30-210-4132-570 e-mail : [email protected] , http://www.gemin.eu ARGE Schlackenneubildung , c/o Mr. Elmar Nieding , Konstantine - Noppel Strasse 25 , D -7760, Radolfzell –Germany

Exchange of Minerals ,Gemstones and Fossils - ,

- From Hellas (Greece) : O , 23 EL-17673 . - Michalis

Samouhos , Meghistis 23 , Kallithea , EL-17673, HELLAS, wishes to exchange minerals with collectors from all over the World. -From Italy : Fabio Bigazzi ,Via dell'Acqua Ghiaccia, 4 - Fontana - 53038 Staggia Senese - Si - Italy -

[email protected] , exchanges minerals with collectors around the World. .

– From France : COUREAU Jean-Vincent , 5 Bis rue de la Grenette , F- 17880 LES PORTES EN RE FRANCE [ e-mail : [email protected] ] is a collector of micros for 15 years . E

. –Interested to exchange minerals (micromounts) with collectors from Greece and other Countries.

– From Greece (Hellas) : CHRISTOS MAROULIS , PLOUTARCHOU 84 , EL- 12137 NEA ZOI , PERISTERI , GREECE , PHONES : 210-5760361, 694-7723908 , E-mail : [email protected] is interested to exchange minerals with collectors from other Countries.

– From Germany : Gunnar Färber Minerals [http://www.seltene-mineralien.de or http://www.minerals-world.com ] has let us know on his new findings : From the Santorini Archipelago in the Aegean Sea, come spectacular new finds of rarities such as Giorgiosite (TYP),[ Mg5(CO3)4(OH)2 . 5H2O ] Ferribarroisite [CaNaFe2+

2.25Mg0.75Fe3+2 ( Si7AlO22)(OH)2] and Majorite [

Mg3(Fe, Al,Si)2(SiO4)3 ] in crystals, together with some unique Zeolites. For inquiries and orders, my email address is [email protected] , and I can also be reached by phone +49 39202 61193 or fax at +49 39202 66892).

– From Greece : I am interested to communicate with collectors on Lavrion minerals and other localities in Greece. Remy bouzard , 23,Vas Georgiou,15232 Halandri , telefone +302106839454 ext 126 , Mob +33668191216, e-mail [email protected] . - . Remy Bouzard ,

. 23 , 152 32 , . 210-6839454 , : 0033-668191216 , : [email protected]

: - NEWS ON MINERALS. Use the friendly phrase : I found you in ORYKTOLOGIKA NEA-NEWS ON MINERALS

Poona , Apophyllite and stilbite crystals , Poona , India (13 8 4 . – cms , 202 grams – )

-NEWS ON MINERALS - 18 - Vol 27 - 161 - 2012 2012

-NEWS ON MINERALS 4 ,

» , 20 2012 . 26 GeMin 2012 23-24-25 2012.

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. -NEWS ON MINERALS ,[ 2012 ] , . 70 ( . ) ,

185 32 International Geological Photography Contest 2012

ORYKTOLOGIKA NEA-NEWS ON MINERALS invite all readers and collectors to get during their vacations a geological , mineralogical photograph , print it in A4 size photographic paper with description of depicted object , name and full contact information of photographer and send it to ORYKTOLOGIKA NEA-NEWS ON MINERALS with the indication “Geological photography Contest” until 20 October 2012 . All submitted photographs will be on display during the 26th GeMin 2012 to be held in Athens , Greece on 23-24-25 November 2012. Visitors will vote for the best photographs and the first 3 winners will win Minerals or Gemstones or Fossils. Best of luck to all of you ! The contest is heavily relied on mineral specimens , crystals , fossils but Geowonders are also sought most for. ORYKTOLOGIKA NEA-NEWS ON MINERALS , [ For the Photography Contest 2012 ] , 70 Gr. Lambraki Avenue (Formerly Queen Sofia Avenue), Piraeus , EL-18532 , Greece

Portitsa (photo by Orliakas co-author Dina Ghikas) is the optimum photo that illustrates what is a "Geowonder"

A Geowonder is a place where the earth has created an inspirational landform. It is a view of mountains and valleys, plains, streams and hills of exceptional beauty. It is a place where natural vegetation is an adornment, and the sky itself the gallery of a living landscape.

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. (Courtesy : Dr. Ann Ewing Rassios , Ph.D.)


, , , GeMin 26 GeMin 2012

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Stay tunned with ORYKTOLOGIKA NEA-NEWS ON MINERALS and GeMin Expo Your Mineral ,Gemstone , Jewellery and Fossil Passports in the Market of Southeastern Europe

An advertisement with ORYKTOLOGIKA NEA-NEWS ON MINERALS will make your products ,

services and your Company known to 25 Countries around the World !


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(Map showing part of Kalamos coast where marl with opal specimens were collected .

Map Courtesy : http://www.google.com/intl/el/earth/index.html )

Intercalations of opal seams inside Neogene marl from Kalamos coast , Attiki County ,Hellas. We were given by Mr. Konstantinos Vlahoyannis ([email protected] ) an aesthetic specimen from the coast of Kalamos , Attiki County , Hellas. (For location see map above). At a first glance , it gives the impression of a typical marl sedimentary rock with intercalated coal seams ,as it is known that Neogene Sedimentary rocks in quite a few areas of Attiki County , namely Rafina, Mesogaia Basin, Kalogreza , Amarousion , Kalamos , Oropos and elsewhere host lignite deposits. It is widely known that some sedimentary rocks may contain chemical elements and have such physical properties so that under certain conditions some minerals may crystallise. For example, pyrite and marcasite form crystals in mud that is rich in sulfur (S), iron (Fe) and organic matter. Opal , hydrated silica , [ SiO2·nH2O ] forms mainly in sedimentary rocks where the groundwater is rich in silica as in Cooper Pedy and Mintabie areas in South Australia. A more careful look of the Kalamos coast specimen reveal that there are intercalations of opal seams within marl layers. The material could be either silicified marl or opal. The hardness and the conchoidal fracture tends for opal. This opal layer is hard (cannot be scratched either by knife or even by Quartz (!!) ) and transition from white to black and reverse is gradual in same layer (zone). Those portions of opal seams without fractures , properly cut , can give beautiful cabochons. (see photographs in next pages).


, , .

12 6 6 ., 556

Marl with intercalations

of opal in white and black color, Kalamos Coast,

Attiki County , Greece. 12 X 6 X 6 cms

556 grams


- .

In the photograph above one can see the overlying marl layer (cap) and underneath the opal layers.

. The above photograph shows the back side of the specimen , where one can see the two marl layers (top and bottom) and opal layer in between. Half of the opal layer is pure white while

the other half is light beige.


– From the collection of K. Vlahoyannis)

, , , 2523 , 20 13 8 .

35-65% 65-35% , . A similar specimen from Kalamos coast in Attiki County , but larger , 2523 grams , 20X13X8 cms.

Marl or marlstone is a calcium carbonate or lime-rich mud or mudstone which contains variable amounts of clays and silt. The dominant carbonate mineral in most marls is calcite, but other carbonate minerals such as aragonite, dolomite, and siderite may be present. Marl was originally an old term loosely applied to a variety of materials, most of which occur as loose, earthy deposits consisting chiefly of an intimate mixture of clay and calcium carbonate, formed under freshwater conditions; specifically an earthy substance containing 35-65% clay and 65-35% carbonate.In Kalamos case it will be good to locate the Si source which gave rise to opal seams as the opal is a result of silicon dioxide and water permeating through the ground. .

, , .

.

1 2 1. Zoned emery , Naxos Island,Aegean Sea,Hellas 2. Marble with zoned texture,Naxos Island,Aegean Sea , Hellas


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