Annite
SOLD
Annite
- Sold
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- Availability
- Sold
- Size
- 3.5 x 2.5 x 0.6 cm - Miniature
- Formula
- KFe2+3(Si3Al)O10(OH)2 (RRUFF)
- Locality
- Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, 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.
Annite is the iron rich, OH end member, of the Biotite- Phlogopite series. Common in schists, worldwide, up to 3m crystals in granites of Cape Ann near Rockport, Mass. USA, crystals up to 15cm from MSH (Bernard & Hrysl). Handbook of Mineralogy - pseudohexagonal outlines, and foliated masses, in Mg poor igneous and metamorphc rocks.
This specimen is only a small dark cleavage plate.
Annite
- Formula
- KFe2+3(Si3Al)O10(OH)2
- Crystal System
- Monoclinic
- Cleavage
- Perfect, None, None
- Luster
- Sub Metallic
- Color
- reddish brown, black
- Streak
- brownish white
- Class
- Monoclinic - Prismatic
- Hardness
- 2.5-3
Data courtesy of Webmineral.
- Collection
- Phillips Collection
- Mineralpedia
- View Annite
- On Dakota Matrix
- Previously Sold Annite
- On Dakota Matrix
- Other Available Annite
- WebMineral
- View Annite
- Mindat
- View Annite
