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Chalcedony

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QRI963512

Chalcedony

Classic Locality

Description Tabs

Description
Locality: 
Barros Cassal, Rio Grande do Sul, Brazil
Class: 
Massive/Crystalline
Size Range: 
Cabinet (10-18 cm)
Size: 
11 × 7.4 × 5.8 cm
Weight: 
238.00gr
Description

Curvilicious specimen of grey-blueish chalcedony from this classic locale. Given the structure of the main core, I cannot exclude this being a pseudomorph over anhydrite or something else (zeolite)?
If you are looking for odd shapes, this is your specimen!

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

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