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Epididymite & Genthelvite

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SYM595786

Epididymite & Genthelvite

Type Locality

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.2 × 1.2 × 1.2 cm
Description

Cluster of epididymite crstals with white genthelvite crystals. Genthelvite fluoresces green under uv light. 

Mineral Data
What's on the rock

Epididymite

Formula: 
Na2Be2Si6O15·H2O
Strunz: 
9.DG.55
Crystal System: 
Orthorhombic
Hardness: 
5.5
Type Locality: 
Narsaarsuk pegmatite (Narssârssuk pegmatite), Narsaarsuk Plateau, Igaliku (Igaliko), Narsaq, Kujalleq, Greenland

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