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Ralstonite with Thomsenolite

#PD42554

Ralstonite with Thomsenolite

#PD42554
Availability
Sold
Size
6 x 4 x 4 cm - Sm Cabinet 
Formula
Na0.5(Al,Mg)2(F,OH)6·H2O (RRUFF)
Locality
Ivigtut mine, Arsuk Fjord, Sermersooq, Greenland

Colorless, excellent crystals of octahedral ralstonite in abundance with minor Thomsenolite.

Type Locality

Ralstonite

Formula
Na0.5(Al,Mg)2(F,OH)6·H2
Crystal System
Isometric 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous - Greasy 
Color
colorless, white 
Streak
white 
Class
Isometric - Hexoctahedral 
Fracture
Brittle - Uneven 
Hardness
4.5 

Data courtesy of Webmineral.

Collection
Phillips Collection
Special Info
Type Locality

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