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Neptunite & Natrolite

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RBR1072322

Neptunite & Natrolite

Classic Locality

Description Tabs

Description
Locality: 
Benitoite Mine, San Benito County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 2.5 × 2.5 cm
Description

This sis a perfect terminated neptunite on matrix from a long defunct location, the famouse Benitoite mine. This WAS the only mine significant neptunite was found so far. 

Mineral Data
What's on the rock

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

Natrolite

Formula: 
Na2Al2Si3O10·2H2O
Strunz: 
9.GA.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Hohentwiel, Singen, Hegau, Baden-Württemberg, Germany

Seller Information

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