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Neptunite & Natrolite

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QRI931451

Neptunite & Natrolite

Classic Locality

Description Tabs

Description
Locality: 
Benitoite Mine, San Benito County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 2.2 × 1.6 cm
Largest Crystal: 
1.10cm
Weight: 
18.00gr
Description

Outstanding thumbnail specimen featuring a prominent neptunite crystal, associated to two minor crystals. Neptunite is in mint conditions, sharp, and mirror lustrous. Color contrast with the surrounding etched natrolite matrix is as good as it gets. 
One of my best ever.

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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Shipping within 15 days after payment received, unless specified/agreed otherwise.

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