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Jonesite

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CR941042

Jonesite

Rare Mineral

Description Tabs

Description
Locality: 
Benitoite Mine, San Benito County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 2.4 × 1.3 cm
Description

Jonesite is a very rare mineral species, named in honor of Francis Tucker Jones (17 Jan 1905, Rocklin, California, USA - 24 September 1993, Richmond, California, USA), professor of chemistry at Pacific University, Forest Grove, Oregon and later chemical microscopist with the U.S. Department of Agriculture.

This specimen hosts superb radiating sprays composed of large colorless-white Jonesite crystals in sprays on matrix of serpentine and etched white Natrolite.

Beautiful and rare

Mineral Data
What's on the rock

Jonesite

Formula: 
Ba4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2·6H2O
Strunz: 
9.DJ.30
Hardness: 
3.0 - 4.0
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