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Quartz

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CFL886264

Quartz

Description Tabs

Description
Locality: 
Iraí, Rio Grande do Sul, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Cabinet (10-18 cm)
Size: 
14.5 × 11 × 3 cm
Description

Beautiful bowl shaped "flower" aggregate of quartz crystals, amethyst variety.  Notice the very nice group of amethyst crystals at the top of the specimen, the variation/zoning in colour from center to periphery, the step-like crystallization from center to periphery, and the concretion at the center of the specimen.

Mineral Data
What's on the rock

Quartz

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

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