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Probertite

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CR738475

Probertite

Rare Mineral

Description Tabs

Description
Locality: 
Kohnstein Quarry, Niedersachswerfen, Nordhausen District, Thuringia, Germany
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.8 × 5.5 × 3.7 cm
Largest Crystal: 
4.50cm
Description

Large and translucent to gemmy proberite crystals very rich in matrix.

Very rich specimen.

Mineral Data
What's on the rock

Probertite

Formula: 
NaCaB5O7(OH)4·3H2O
Strunz: 
6.EB.15
Hardness: 
3.5
Streak: 
White
Type Locality: 
Baker mine, U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; U.S. Borax and Chemical Corp.; Kramer Mine; Baker Mine), Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA