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Sérandite Genthelvite Astrophyllite & Ancylite

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PJM77027

Sérandite Genthelvite Astrophyllite & Ancylite

Ex J & S Mommers Collection

Description Tabs

Description
Locality: 
Mont Saint-Hilaire, Montérégie, Québec, Canada
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.2 × 3.7 × 2.3 cm
Description

A series od stacked doubly terminated serandite crystal provide the matrix for creamy coloured genthelviye crystals, off white sprays of ancylite, astrophyllite and a aegerine black rod that protrudes from one side. A field trip in a miniatire

Acquire by the seller in Tucson in1998

Mineral Data
What's on the rock

Sérandite

Formula: 
Na(Mn2+,Ca)2(HSi3O9)
Strunz: 
9.DG.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Rouma Island (Roume Island; Roma Island; Ruma Island), Los Archipelago (Los Islands), Guinea

Genthelvite

Formula: 
Zn4(Be3Si3O12)S
Strunz: 
9.FB.10
Hardness: 
6.0 - 6.5
Type Locality: 
West Cheyenne Canon, Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA

Astrophyllite

Formula: 
(K,Na)3(Fe,Mn)7Ti2Si8O24(O,OH)7
Strunz: 
9.DC.05
Crystal System: 
Triclinic
Hardness: 
3.0
Streak: 
Golden
Type Locality: 
Låven (Skådön; Lamö; Lamanskjaer), Langesundsfjorden, Larvik, Vestfold, Norway

Ancylite

Synonym Of: 

Ancylite-(Ce)

Formula: 
SrCe(CO3)2(OH)·H2O
Strunz: 
5.DC.05
Hardness: 
4.0 - 4.5

Ancylite-(La)

Formula: 
Sr(La,Ce)(CO3)2(OH)·H2O
Strunz: 
5.DC.05
Hardness: 
4.0 - 4.5
Earthstones Australia

Seller Information

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