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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

Biotite

By: Sammy Melcer and Heberth Haas


Characteristics
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
Chemistry

  • Potassium

  • Iron

  • Magnesium

  • Aluminum

  • Silicate

  • Hydroxide

  • Fluoride


Where it is found
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


Mining and process
Mining and Process

  • It is mined through quarrying or underground mining depending on how deep it is


Value
Value

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


Uses

  • Biotite has no uses known

  • It is probably just used as a decoration



Gemstone vs mineral
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


Our birthstones
Our Birthstones

  • Sammy: Emerald

  • Heberth: Amethyst