Minerals.

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Mineral Identification

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Presentation transcript:

Minerals

Graphite Hardness: 2-3 Streak: Gray/black Luster: Greasy Specific gravity 1.9-2 Used in pencils

Hornblende Hardness: 5-6 Streak: Grey Luster: Shiny Specific gravity: 3.2

Magnetite Hardness: 5.5 Streak: Black Luster: Metallic Specific gravity: 5.2 Magnetic!

Galena Hardness: 2.5 Streak: Grayish-black Luster: Metallic Specific gravity: 7.4

Mica (muscovite) Hardness: 2-2.5 Streak: White Luster: Pearly, metallic Specific gravity: 2.8 -Cleaves into sheets - Used in make-up (for shimmer)

Pyrite Hardness: 6.5 Streak: Greenish-black Luster: Metallic Specific gravity: 5.0-5.2 Also known as “Fool’s Gold”

Calcite Hardness: 3 Streak: White Luster: Glassy Specific gravity: 2.7 Rhombohedral cleavage Dissolves in acid

Halite Hardness: 2.5 Streak: White Luster: Glassy Specific gravity: 2.17 Rock salt Cubic

Quartz Hardness: 7 Streak: White Luster: Greasy Specific gravity: 2.65 Hard enough to cut glass Primary mineral found in sand

Talc Hardness: 1 Streak: White Luster: Dull/pearly Specific gravity: 2.7-2.8 Often used as a powder

Sulfur Hardness: 2.5 Streak: White Luster: Waxy Specific gravity: 2.06 Smells like rotten eggs

Corundum Hardness: 9 Streak: White Luster: Vitreous Specific gravity: 4 Rubies and sapphires

Hematite Hardness: 6-6.5 Streak: Red-brown Luster: Dull Specific gravity: 5.2 Mineral form of iron oxide

Fluorite Hardness: 4 Streak: White Luster: Greasy Specific gravity: 3.2-3.5

Olivine Hardness: 6.5-7 Streak: White Luster: Greasy Specific gravity: 3.3-4.2