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Benitoite & Neptunite

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MSD944423

Benitoite & Neptunite

Description Tabs

Description
Locality: 
Dallas Gem Mine, San Benito County, California, United States of America
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.2 × 8.7 × 3.6 cm
Weight: 
398.00gr
Description

Here we have a large, richly set specimen of blue benitoite and black elongated neptunite.
Very hard to find in this size at this reasonable price.

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