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Tinsleyite

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BCK218589

Tinsleyite

Type Locality

Description Tabs

Description
Locality: 
Tip Top Mine, Fourmile, Custer County, South Dakota, United States of America
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 1.2 × 1 cm
Description

You are bidding on a small specimen with a vug bearing a small group of tinsleyite crystals with bermanite and other species. The tinsleyite crystals are so dark purple as to almost appear black and invisible! The crystals are sharp with very high luster.

Mineral Data
What's on the rock

Tinsleyite

Formula: 
KAl2(PO4)2(OH)·2H2O
Strunz: 
8.DH.10
Hardness: 
5.0
Type Locality: 
Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA

Seller Information

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