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Minerals

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Minerals

What are minerals? Naturally occurring Inorganic Solid Specific chemical compositions

Made up of specific compounds or elements

Definite crystalline structure Form in open spaces and crystals grow to

fill that space

Page 3: Minerals. What are minerals? Naturally occurring Inorganic Solid Specific chemical compositions Made up of specific compounds or elements

Mineral Identification Color Luster Streak Hardness Breakage

Page 4: Minerals. What are minerals? Naturally occurring Inorganic Solid Specific chemical compositions Made up of specific compounds or elements

Mineral Identification Color

Caused by trace elements or compounds within a mineral

Luster The way a mineral reflects light

Metallic minerals- reflects light Non-metallic- do not shine

Glassy, greasy, pearly, dull or earthy

Page 5: Minerals. What are minerals? Naturally occurring Inorganic Solid Specific chemical compositions Made up of specific compounds or elements

Mineral Identification Hardness

Measures how easily a mineral can be scratched Moh’s Scale (1-10)

Finger nail, glass, streak plate

Streak The color of a mineral when it is broken

up and powdered.

Page 6: Minerals. What are minerals? Naturally occurring Inorganic Solid Specific chemical compositions Made up of specific compounds or elements

Mineral Identification Breakage

Minerals break along planes where atomic bonding is weak. Cleavage- a mineral splits evenly along

planes Fracture- minerals that break with

rough/jagged edges.

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