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Benitoite With Neptunite

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LGM957437

Benitoite With Neptunite

Ex Alex Franz, Ex C. Rewitzer, Furth i. Wald, Germany
With Antique Label

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Description Tabs

Description
Locality: 
San Benito County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
2.2 × 4.6 × 2 cm
Largest Crystal: 
1.50cm
Weight: 
18.30gr
Description

A fine blue, partly gemmy benitoite crystal (size 15 mm on edge), accompanied by black neptunite and embedded in white masses of amorphous natrolite on matrix.

Originally from old Dr. Krantz stock, comes with Krantz label dated to the 1960's or 70's plus Alex Franz Label.

Mineral Data
What's on the rock

Benitoite

Formula: 
BaTi(Si3O9)
Strunz: 
9.CA.05
Crystal System: 
Hexagonal
Hardness: 
6.0 - 6.5
Type Locality: 
California State Gem Mine (Dallas Gem Mine; Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA

Neptunite

Formula: 
Na2KLi(Fe2+,Mn2+)2Ti2(Si8O24)
Strunz: 
9.EH.05
Hardness: 
5.0 - 6.0
Colour: 
Black
Type Locality: 
Narsaarsuk pegmatite (Narssârssuk pegmatite), Narsaarsuk Plateau, Igaliku (Igaliko), Narsaq, Kujalleq, Greenland

Seller Information

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