Cummingtonite
SOLD
Cummingtonite
- Sold
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- Availability
- Sold
- Size
- 12 x 9 x 8 cm - Cabinet
- Formula
- □Mg7Si8O22(OH)2 (RRUFF)
- Locality
- Kola Peninsula, Russia
Massive compact fibrous crystals in divergent fans to 5cm - impressive. Old Russian label see prov. tab.
Cummingtonite
- Formula
- [box]Mg7Si8O22(OH)2
- Crystal System
- Monoclinic
- Crystal Habit
- Columnar, Fibrous, Granular
- Cleavage
- Perfect, Distinct, None
- Luster
- Vitreous - Silky
- Color
- white, black, blackish brown, blackish green, gray
- Streak
- grayish white
- Class
- Monoclinic - Prismatic
- Fracture
- Brittle - Conchoidal
- Hardness
- 5-6
Data courtesy of Webmineral.
- Collection
- Phillips Collection
- Mineralpedia
- View Cummingtonite
- On Dakota Matrix
- Previously Sold Cummingtonite
- On Dakota Matrix
- Other Available Cummingtonite
- WebMineral
- View Cummingtonite
- Mindat
- View Cummingtonite
