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Biotite

Biotite. By: Sammy Melcer and Heberth Haas. Characteristics. Color: : black, brown, or yellow Pearly luster Transparency: transparent to translucent Perfect cleavage Hardness: 2.5 Streak: white Density: 2.9-3.4 Class: Silicates. Chemistry. Potassium Iron Magnesium Aluminum

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Biotite

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  1. Biotite By: Sammy Melcer and Heberth Haas

  2. Characteristics • Color: : black, brown, or yellow • Pearly luster • Transparency: transparent to translucent • Perfect cleavage • Hardness: 2.5 • Streak: white • Density: 2.9-3.4 • Class: Silicates

  3. Chemistry • Potassium • Iron • Magnesium • Aluminum • Silicate • Hydroxide • Fluoride

  4. Where it is Found • Evje, Norway • Bessnes, France • Uluguru mountains in Tanzania • Ontario, Canada • Laacher See, Germany • It is not found in the United States

  5. Mining and Process • It is mined through quarrying or underground mining depending on how deep it is

  6. Value • The price of biotite is about $2.72 US dollars per gram

  7. Uses • Biotite has no uses known • It is probably just used as a decoration

  8. Crystallized Biotite

  9. Gemstone vs. Mineral • Gemstone: a mineral that is in a cut and polished form • Not all minerals are gemstones because they can’t be cut evenly or can’t be polished

  10. Our Birthstones • Sammy: Emerald • Heberth: Amethyst

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