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0 item @ $0.00  

Schorl tourmaline

#AH53606

Schorl tourmaline

#AH53606
Availability
Available
Price
$40.00
Size
8.5 x 6.5 x 4 cm - Sm Cabinet 
Formula
NaFe2+3Al6(BO3)3Si6O18(OH)4 (RRUFF)
Locality
Gillette quarry, Middlesex Co., Connecticut, United States
Tagged
pegmatite mineral

Portions of large Schorl crystals to 4cm, not terminated with Quartz, Mica and Microcline, typical pegmatite assemblage.

It's an old-timer collected in 1946 by Arnold Hampson.

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
Arnold G Hampson Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Schorl
On Dakota Matrix
Other Available Schorl
WebMineral
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Mindat
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