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Chalcedony & Calcite On Quartz

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PDM642642

Chalcedony & Calcite On Quartz

Floater

Description Tabs

Description
Locality: 
Concepcion Del Oro, Zacatecas, Mexico
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 5.7 × 3 cm
Description

A floater specimen of quartz partially covered by botryoidal cryptocrystalline quartz (variety chalcedony) and calcite crystal.

From the recently acquired collection of Marcel Cromphout, #999, who bought it in 1975.

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Seller Information

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