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Esquireite Witherite & Fresnoite

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BCK503864

Esquireite Witherite & Fresnoite

Robert Walstrom collection IMA2014-066
New Mineral type

Description Tabs

Description
Locality: 
Esquire #1 Claim, Rush Creek, Fresno County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.4 × 2.6 × 1.3 cm
Description

You are bidding on a small miniature specimen with rich platy crystals of the new species esquireite on fracture surfaces in sanbornite. Also present are spheres of witherite, elongated crystals of ettringite? and embedded yellow crystals of fresnoite. This is an exceptional example of this new mineral from the discoverer's stock. Comes with Robert Walstrom label. 

Mineral Data
What's on the rock

Esquireite

Formula: 
BaSi6O13·7H2O
Crystal System: 
Monoclinic
Hardness: 
2
Colour: 
Colorless
Streak: 
White
Type Locality: 
Esquire No. 1 claim, Rush Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA

Witherite

Formula: 
BaCO3
Strunz: 
5.AB.15
Crystal System: 
Orthorhombic
Hardness: 
3.0 - 3.5
Streak: 
White
Type Locality: 
Brownley Hill Mine (Bloomsberry Horse Level), Nenthead, Alston Moor District, North Pennines, North and Western Region (Cumberland), Cumbria, England, UK

Fresnoite

Formula: 
Ba2Ti(Si2O7)O
Strunz: 
9.BE.15
Hardness: 
3.0 - 4.0
Type Locality: 
Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA

Seller Information

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