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Hurlbutite & Englishite

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BCK203758

Hurlbutite & Englishite

Classic Locality

Description Tabs

Description
Locality: 
Tip Top Mine, Fourmile, Custer County, South Dakota, United States of America
Size Range: 
Thumbnail (1-3cm)
Size: 
1.4 × 1.2 × 0.7 cm
Description

You are bidding on a small specimen with very rich spheres of hurlbutite with small groups of white englishite, red montgomeryite , robertsite, and sprays of CO3-apatite. The richest hurlbutite specimen I've seen from Tip Top!

Mineral Data
What's on the rock

Hurlbutite

Formula: 
CaBe2(PO4)2
Strunz: 
8.AA.15
Crystal System: 
Orthorhombic
Hardness: 
6.0
Streak: 
White
Type Locality: 
Chandlers Mill Quarry, Newport, Sullivan Co., New Hampshire, USA

Englishite

Formula: 
K3Na2Ca10Al15(PO4)21(OH)7·26H2O
Strunz: 
8.DH.55
Crystal System: 
Monoclinic
Hardness: 
3.0
Type Locality: 
Clay Canyon, Fairfield, Oquirrh Mts, Utah Co., Utah, USA

Seller Information

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