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Minerals. What is a Mineral?. A mineral is inorganic . Minerals are naturally occurring. Minerals are solids . Minerals have a crystal structure. Minerals have a definite chemical composition. How do we Identify Minerals?. Color Streak - the color of its powder. - PowerPoint PPT Presentation

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Page 1: Minerals

Minerals

Page 2: Minerals

What is a Mineral?A mineral is inorganic.Minerals are naturally occurring.Minerals are solids.Minerals have a crystal structure.Minerals have a definite chemical composition.

Page 3: Minerals

How do we Identify Minerals?ColorStreak- the color of its powder.

Luster- how it reflects light.

Density- mass/ volume

Hardness- Mohs hardness scale- ranks 10 minerals from softest to hardest. Hardness is determined by a scratch test.

Crystal structureCleavage and fracture- the way a mineral breaks apart.

Page 4: Minerals

How do Minerals Form?Hot magma cooling inside the Earth.

Lava hardening outside, on the surface of the Earth.

Elements and compounds dissolving in water (solution).

Evaporation


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