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Benitoite Neptunite & Joaquinite

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ALB115802

Benitoite Neptunite & Joaquinite

Description Tabs

Description
Locality: 
Benitoite Mine, San Benito County, California, United States of America
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.2 × 5.1 × 1.8 cm
Description

A nice example of the San Benito mine minerals association. In one sample there are three nice minerals: five blue benitoite, up to 05 cm almost gemmy from light blue to deep blue color; six deep red neptinite up to 1.2 cm; and two brown gemmy joaquinite about 0.05 cm

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

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