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Quartz Var Chalcedony

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RSL567066

Quartz Var Chalcedony

Fluorescent

Description Tabs

Description
Locality: 
Smara, Es-Semara Province, Laâyoune-Sakia El Hamra Region, Morocco
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 4 × 3.8 cm
Description

A floater nodule with blackish and whitish spheroidal forms with some visible crystalline faces. They're a silicified fossil sponge which have preserved the original morphology of the biological specimens.

Mineral Data
What's on the rock

Quartz

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

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