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Ashcroftine Monteregianite Turkestanite & Narsarsukite

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BCK734902

Ashcroftine Monteregianite Turkestanite & Narsarsukite

Rare Mineral

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3.9 × 1.9 cm
Description

You are bidding on a rich, and unusual sample from MSH with a multitude of species. Rich fibrous ashcroftine is accompanied by pink sprays of monteregianite-Y, tiny tabular and twinned brown plates of turkestanite, yellow plates of narsarsukite, a few small plates and barrels of donnayite or mckelveyite and several unidentified species. 

Mineral Data
What's on the rock

Monteregianite

Synonym Of: 

Monteregianite-(Y)

Formula: 
(Na,K)6(Y,Ca)2Si16O38·10H2O
Strunz: 
9.EB.15
Hardness: 
3.5

Turkestanite

Formula: 
(K,◻)(Ca,Na)2(Th,U)[Si8O20
Strunz: 
9.CH.10
Crystal System: 
Tetragonal
Hardness: 
5.5 - 6.0
Type Locality: 
Darai-Pioz Glacier (Dara-i-Pioz; Dara-Pioz), Alai Range (Alayskiy), Tien Shan Mtn, Region of Republican Subordination, Tajikistan

Narsarsukite

Formula: 
Na4(Ti,Fe)2[Si8O20](O,OH,F)2
Strunz: 
9.DJ.05
Hardness: 
7.0
Type Locality: 
Narsaarsuk pegmatite (Narssârssuk pegmatite), Narsaarsuk Plateau, Igaliku (Igaliko), Narsaq, Kujalleq, Greenland

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