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Chalcedony & Pyrite

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PDM761202

Chalcedony & Pyrite

Description Tabs

Description
Locality: 
South Dakota, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 3.7 × 1.8 cm
Description

Botryoidal light blue chalcedony coating the matrix and richly scattered by tinny lustrous octahedral crystals of pyrite. The associated label of the Dr. Gerard Vogel collections reads that it is from South Dakota (USA), without further specific information.

Acquired in Tucson by Dr. Vogel in 1984.

Mineral Data
What's on the rock

Chalcedony

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Kadıköy (Chalcedon), Istanbul Province, Marmara Region, Turkey

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5

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