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Englishite & Montgomeryite

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SKY873871

Englishite & Montgomeryite

Type Locality

Description Tabs

Description
Locality: 
Tip Top Mine, Fourmile, Custer County, South Dakota, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2.5 × 1 cm
Description

White crystals of englishite associated to orange montgomeryite from the famous Tip Top mine in  South Dakota.

Very nice under the microscope !

Ex Vandenbroucke Museum collection from Waregem, Belgium.

 

Mineral Data
What's on the rock

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

Montgomeryite

Formula: 
Ca4MgAl4(PO4)6(OH)4·12H2O
Strunz: 
8.DH.25
Hardness: 
4.0
Type Locality: 
Clay Canyon, Fairfield, Oquirrh Mts, Utah Co., Utah, USA

Current price

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20
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Start 04 Jan 18:00
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5.50
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9
Rest of the World
10

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