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Greigite & Gmelinite

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BCK601962

Greigite & Gmelinite

Rare Mineral

Description Tabs

Description
Locality: 
U S Borax Mine, Boron, Kern County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 1.1 × 1 cm
Description

You are bidding on a small sample with a large vug coated in thousands of minute greigite octahedra with colorless, tabular gmelinite crystals. Rare!

Mineral Data
What's on the rock

Greigite

Formula: 
Fe2+Fe3+2S4
Strunz: 
2.DA.05
Crystal System: 
Isometric
Hardness: 
4.0 - 4.5
Streak: 
black
Type Locality: 
Four Corners No. 3; 4 & 5 wells, Kramer-Four Corners area, San Bernardino Co., California, USA

Gmelinite

Synonym Of: 

Gmelinite-Ca

Formula: 
(Ca,Na2)[Al2Si4O12]·6H2O
Strunz: 
9.GD.05
Hardness: 
4.5

Gmelinite-K

Formula: 
(K2,Na2,Ca)[Al2Si4O12]·6H2O
Strunz: 
9.GD.05
Hardness: 
4.5

Gmelinite-Na

Formula: 
(Na2,Ca)[Al2Si4O12]·6H2O
Strunz: 
9.GD.05
Hardness: 
4.5
Group Parent: 
Zeolite Group

Seller Information

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