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Probertite & Strontioginorite

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CLL207162

Probertite & Strontioginorite

Gem Crystal

Description Tabs

Description
Locality: 
Kohnstein Quarry, Niedersachswerfen, Nordhausen District, Thuringia, Germany
Size Range: 
Cabinet (10-18 cm)
Size: 
11.6 × 7 × 2 cm
Largest Crystal: 
4.50cm
Description

Fantastic big probertite on matrix, which is very very rare, even partly terminated and superb brilliance. Beside it a perfect terminated, gemmy and waterclear strontioginorite on matrix. A very good collector speciman for this mineral and locality.

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

Strontioginorite

Formula: 
(Sr,Ca)2B14O23·8H2O
Strunz: 
6.FC.15
Crystal System: 
Monoclinic
Hardness: 
2.0 - 3.0
Type Locality: 
Königshall-Hindenburg Mine, Reyershausen, Göttingen, Lower Saxony, Germany
Collectors Paradise

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