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Pigeonite & Olivine

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UVM634852

Pigeonite & Olivine

Rare Mineral

Description Tabs

Description
Locality: 
San Carlos Indian Reservation, Gila County, Arizona, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 2.3 × 1.7 cm
Description

Several crystalline areas of pigeonite in a crumbly olivine matrix.   The pigeonite has a similar color to the olivine, but looks like it had been smeared with a serrated butterknife.   Quite exceptional for the species which is rarely found in macroscopic terrestrial specimens.   

Mineral Data
What's on the rock

Pigeonite

Formula: 
(Mg,Fe2+,Ca)(Mg,Fe2+)Si2O6
Group Parent: 
Clinopyroxene Subgroup
Strunz: 
9.DA.10
Hardness: 
6.0
Type Locality: 
Pigeon Point, Cook Co., Minnesota, USA

Olivine

Synonym Of: 

Olivine Group

Formula: 
(Mg,Fe2+)2SiO4
Group Parent: 
Olivine
Crystal System: 
Orthorhombic
Hardness: 
6.5 - 7
Colour: 
Yellowish green, olive green, greenish black, or reddish brown
Streak: 
White

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