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Joaquinite-(Ce) & Neptunite

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CHP1167622

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Description
Locality: 
California State Gem Mine, San Benito County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.7 × 2.8 × 1.8 cm
Description

specimen with a very nice brownish-yellow crystal of joaquinite-(Ce) with associate a blackish dark red crystal of neptunite on matrix.

c. Bt26 

Mineral Data
What's on the rock

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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30
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Start 21 Feb 18:00
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