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Oligoclase

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DVD1009638

Oligoclase

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Description
Locality: 
Plush, Lake County, Oregon, United States of America
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2.8 × 2.2 cm
Description

Oligoclase variety of plagioclase feldspar, commonly know as Oregon Sunstone in basalt from the well known Sunstone area in Oregon. This is a very rich piece with a good sized piece along with a 1.7ct faceted piece of pale yellow Oligoclase, the same as the piece in matrix. I faceted a piece of rough into a 8.5x6.9mm cushion cut gem. The faceted gem contain no inclusions.

Normally the sunstone is collected as loose fragments for faceting but I liked some in matrix and then combined with a faceted gem in my opinion is the ultimate combo. I hope you think so too.

Mineral Data
What's on the rock

Oligoclase

Variety Of: 

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Hardness: 
6.0 - 6.5
Formula: 
(Na,Ca)[Al(Si,Al)Si2O8]
Strunz: 
9.FA.35
Hardness: 
6.0 - 6.5
Streak: 
White

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