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Opal

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BMM703749

Opal

Description Tabs

Description
Locality: 
Puy du Mur Quarry, Mur-sur-Allier, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
Class: 
Single Crystal
Size Range: 
Thumbnail (1-3cm)
Size: 
1.7 × 1.3 × 1.1 cm
Description

A single beautifully replaced white satiny lustered rare gastropod Land Snail of Oligocene age. The Opal-CT replaced rare Helix Ramondi land snail for the Mineral and Fossil collector.

Mineral Data
What's on the rock

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Streak: 
White