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Monteregianite-(Y) & Tainiolite

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GMN196410

Monteregianite-(Y) & Tainiolite

Type Locality

Description Tabs

Description
Locality: 
Mont Saint-Hilaire, Montérégie, Québec, Canada
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2.3 × 1.8 cm
Description

Very good grey monteregianite clusters, and sprays of columnar crystals in the matrix cavity.
Associated with tainiolite lamellas. (some of them is intact, but most of the tainiolite crysal are broken.)

Mineral Data
What's on the rock

Monteregianite-(Y)

Formula: 
(Na,K)6(Y,Ca)2Si16O38·10H2O
Strunz: 
9.EB.15
Hardness: 
3.5
Type Locality: 
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Tainiolite

Formula: 
KLiMg2(Si4O10)F2
Strunz: 
9.EC.15
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0
Type Locality: 
Narsaarsuk pegmatite (Narssârssuk pegmatite), Narsaarsuk Plateau, Igaliku (Igaliko), Narsaq, Kujalleq, Greenland

Seller Information

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