Biotite series with Magnetite
SOLD
Biotite series with Magnetite
- Sold
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- Availability
- Sold
- Size
- 5 x 4 x 3.5 cm - Miniature
- Formula
- Unavailable
- Locality
- Faraday mine, Hastings Co., Ontario, Canada
Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Trioctahderal. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.
An interesting specimen with octahedral Magnetite. Magnetite is usually fromed from the breakdown of Biotite.
Biotite
- Formula
- K(Mg,Fe++)3[AlSi3O10(OH,F)2
- Crystal System
- Monoclinic
- Crystal Habit
- Micaceous, Lamellar, Pseudo Hexagonal
- Cleavage
- Perfect, None, None
- Luster
- Vitreous - Pearly
- Color
- dark brown, greenish brown, blackish brown, yellow, white
- Streak
- gray
- Class
- Monoclinic - Prismatic
- Fracture
- Uneven
- Hardness
- 2.5-3
Data courtesy of Webmineral.
- Collection
- Phillips Collection
- Mineralpedia
- View Biotite
- On Dakota Matrix
- Previously Sold Biotite
- On Dakota Matrix
- Other Available Biotite
- WebMineral
- View Biotite
- Mindat
- View Biotite
