Schorl Tourmaline
SOLD
Schorl Tourmaline
- Sold
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- Availability
- Sold
- Size
- 9.5 x 4.5 x 3.5 cm - Cabinet
- Formula
- NaFe2+3Al6(BO3)3Si6O18(OH)4 (RRUFF)
- Locality
- Santa Cruz, Sonora, Mexico
This is an interesting specimen that a label that came with the piece describes as 'velvety' Tourmaline. It appears to be a group of parallel crystals composed of fine black needles of Schorl that indeed give it a black velvety appearance.
Schorl
- Formula
- NaFe2+3Al6(BO3)3Si6O18(OH)4
- Crystal System
- Trigonal
- Crystal Habit
- Acicular, Prismatic, Striated
- Cleavage
- Indistinct, None, None
- Luster
- Vitreous (Glassy)
- Color
- black, brownish black, greenish black, bluish black
- Streak
- brown
- Class
- Trigonal - Ditrigonal Pyramidal
- Fracture
- Brittle - Conchoidal
- Hardness
- 7.5
Data courtesy of Webmineral.
- Collection
- Phillips Collection
old label from unknown dealer & a label from the Rare Mineral Exchange
- Mineralpedia
- View Schorl
- On Dakota Matrix
- Previously Sold Schorl
- On Dakota Matrix
- Other Available Schorl
- WebMineral
- View Schorl
- Mindat
- View Schorl
