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1 item @ $25.00  
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Riebeckite on Microcline

#65953
SOLD
Riebeckite from Washington Pass, Okanogan Co., Washington, United States - 65953
Riebeckite from Washington Pass, Okanogan Co., Washington, United States - 65953

Riebeckite on Microcline

#65953
Availability
Sold
Size
1 x 1.5 x 1.2 cm - Thumbnail 
Formula
□Na2(Fe2+3Fe3+2)Si8O22(OH)2 (RRUFF)
Locality
Washington Pass, Okanogan Co., Washington, United States

Nice thumbnail specimen with very good black, striated crystals to 1cm on Microcline.

Riebeckite

Formula
[box]Na2(Fe2+3Fe3+2)Si8O22(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Striated, Fibrous, Massive - Fibrous 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous - Silky 
Color
blue, black, dark green 
Streak
greenish brown 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness
4 

Data courtesy of Webmineral.

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