Biotite Mica Information's

 

Biotite

Discovery

Biotite was first described in 1847 by Johann Friedrich Ludwig Hausmann, a German mineralogist.

Physical Properties

• Color: Black, Brown, Green, Reddish-Brown
• Crystal System: Monoclinic
• Hardness: 2.5 - 3
• Luster: Vitreous
• Streak: Brown
• Transparency: Translucent to opaque
• Cleavage: Perfect basal cleavage
• Fracture: Uneven to conchoidal
• Tenacity: Brittle
• Specific Gravity: 2.7 - 3.3

Optical Properties

• Refractive Index: 1.57 - 1.73
• Birefringence: 0.04 - 0.08
• Pleochroism: Weak
• Optical Character: Biaxial (-)

Occurrence by Country

Biotite is found in many parts of the world, including:

• United States
• Canada
• Brazil
• India
• Russia
• South Africa
• Australia

Healing Properties

Biotite is believed to aid in the treatment of:

• Anxiety
• Depression
• Stress
• Insomnia
• Obsessive-Compulsive Disorder (OCD)
• Arthritis

Uses

Biotite is a common mineral in many rocks and is often used as an indicator mineral in geology. It is also used in the manufacture of paint and in the production of asphalt roofing materials.