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Gypsum

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MCP728711

Gypsum

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Description
Locality: 
Rosignano Marittimo, Livorno, Tuscany, Italy
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
5.5 × 11.5 × 3.3 cm
Largest Crystal: 
2.50cm
Description

Rich, greyish, partly lustrous, striated gypsum crystals up to 25 mm tall on matrix from Rosignano, Tuscany, Italy. Most of the gypsum crystals are twins, with the typical striations along the prismatic faces. The crystal sshow only minor imperfections. Size 115x55x33 mm.

Mineral Data
What's on the rock

Gypsum

Formula: 
CaSO4·2H2O
Strunz: 
7.CD.40
Hardness: 
2.0
Streak: 
White.

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