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Benitoite Joaquinite-(Ce) & Neptunite

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CFL1084090

Description Tabs

Description
Locality: 
San Benito River, San Benito County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 5.5 × 2.5 cm
Description

Representative type locality specimen of benitoite and joaquinite-(Ce) crystals associated with neptunite.  Most of the neptunite are damaged.  Ex-Prof. E. Wm. Heinrich Collection specimen, University of Michigan (label).  Ex-A.E. Seaman Mineral Museum specimen (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

Joaquinite-(Ce)

Formula: 
NaBa2Ce2FeTi2[Si4O12]2O2(OH,F)·H2O
Strunz: 
9.CE.25
Hardness: 
5.0 - 5.5
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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$16
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$14
Europe
$15
Rest of World
$17

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