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Glaucophane

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PJM54729

Glaucophane

Description Tabs

Description
Locality: 
Cazadero, Sonoma County, California, United States of America
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.2 × 4.1 × 1.3 cm
Description

Glaucophane is an uncommon amphibole group mineral and is found in low to medium temperature metamorphic terrains and this specimen shows well defined blue black crystals of glaucophane in a matrix green actinolite matrix.

Mineral Data
What's on the rock

Glaucophane

Formula: 
◻[Na2][Mg3Al2]Si8O22(OH)2
Strunz: 
9.DE.25
Hardness: 
5.0 - 6.0
Type Locality: 
Syros Island (Syra), Cyclade Islands (Cyclades; Kikladhes; Nomos Kikladhon), Kykládes Prefecture, Aegean Islands Department (Aiyaíon), Greece
Earthstones Australia

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