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FLUORITE - CaF 2

“The most colorful mineral in the world” Class: Halides Color: Green, yellow, purple Cleavage: Perfect in 4 directions forming octahedrons Specific gravity: 3.1+ Hardness: 4 Streak: White. FLUORITE - CaF 2. FELDSPAR – Microcline KAlSi 3 O 8. Name given to most abundant group of minerals

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FLUORITE - CaF 2

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  1. “The most colorful mineral in the world” Class: Halides Color: Green, yellow, purple Cleavage: Perfect in 4 directions forming octahedrons Specific gravity: 3.1+ Hardness: 4 Streak: White FLUORITE - CaF2

  2. FELDSPAR – Microcline KAlSi3O8 • Name given to most abundant group of minerals • Used for glass, ceramics, pottery, enamelware, soaps, abrasives, cements, fertilizer • Class: Silicates • Color: Off-white, yellow, pink, green, brown • Cleavage: Perfect in one and good in another direction forming nearly right angled prisms • Hardness: 6 – 6.5 • Specific gravity: 2.5 • Streak: white

  3. HEMATITE - Fe2O3 • Mined as main ore of iron • Comes from the Greek word for blood • Class: Oxides • Color: grey, black, red, brown • Cleavage: Absent • Specific gravity: 5.3 • Hardness: 5 – 6 • Streak: dark red

  4. Common world wide, aka Fool's Gold Class: Sulfides Color: Brassy yellow Cleavage: Very distinct Specific Gravity: 5.2 Hardness: 6 - 6.5 Streak: Brown, greenish-black PYRITE - FeS2

  5. Quartz is most common mineral and silicon is the 2nd most common element in the Earth's crust Class: Silicates Color: Various shades of white Cleavage: None Specific Gravity: 2.6 Hardness: 7 Streak: None QUARTZ – MilkySiO2

  6. 4% by weight of Earth’s crust Name comes from greek chalix meaning lime Class: Carbonates Color: White, yellow, brown, blue Cleavage: Perfect in 3 directions forming rhombohedrons Specific Gravity: 2.7 Hardness: 3 Streak: White CALCITE - CaCO3

  7. Found in igneous, sedimentary, and metamorphic rock Mica crystals are six-sided Class: Silicates Color: Colorless, yellow, brown Cleavage: In 1 direction producing flakes or sheets Specific gravity: 2.8 Hardness: 2- 2.5 Streak: None MICA – Muscovite KAl2(AlSi3O10)(F, OH)2

  8. Magnetite - Fe3O4 • Naturally magnetic • Class: Oxides • Color: Black • Cleavage: Absent • Specific gravity: 5.1 • Hardness: 5.5-6.5 • Streak: black

  9. GYPSUM - AlbasterCaSO4 • Gypsum has several variety names • Class: Sulfates • Cleavage: good in one direction and distinct in two others • Hardness: 2, can be scratched by fingernail • Specific Gravity: 2.3+ • Streak: white

  10. TALC - Mg3Si4O10(OH)2 • Very Soft • Class: Silicates • Color: white, green, and gray • Cleavage: Perfect in one direction (break into clean sheets) • Hardness: 1 (softest mineral) • Specific gravity: 2.7 - 2.8 (average) • Streak: white

  11. HALITE - NaCl • Salt • Class: Halides • Cleavage: Perfect in three directions forming cubes • Colorless, white, or pink • Specific Gravity: 2.1 • Hardness: 2 • Streak: white

  12. MICA – Biotite K(Fe,Mg)3AlSi3O10(F,OH)2 • Class: Silicates • Color is green, brown, or black • Cleavage: perfect in 1 direction producing flakes or thin sheets • Specific gravity: 2.9 -3.4 • Hardness: 2.5 – 3 • Streak: none

  13. Graphite • Class: Carbon • Cleavage is perfect in one direction • Color: black • Specific gravity: 2 – 2.3 • Hardness: 1-2 • Streak: black

  14. Gypsum – Selenite CaSO4·2H2O • Class: sulfates • Cleavage: distinct in two directions • Color: colorless • Specific gravity: 2.3 • Hardness: 2 • Streak: white

  15. Source of over 99% of metallic aluminum Can look like clay or soil BAUXITE

  16. One of the world’s major sources of energy Used to produce more than half of all the electrical energy that is generated and used in the United States. COAL

  17. It is the hardest substance known Number 9 on Mohs' hardness scale Diamond will cut through any material DIAMOND

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