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Quartz Psm Gypsum

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PDM655439

Quartz Psm Gypsum

Pseudomorph

Description Tabs

Description
Locality: 
Molina de Segura, Murcia, Spain
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.9 × 3.4 × 1.8 cm
Description

A good perimorph pseudomorph formed by a thin layer of quartz (variety chalcedony) as a crust on a lenticular crystal of gypsum. The specimen is free of damage and displays good UV yellow fluorescence under long UV illumination.

Self-collected in 2013.

Mineral Data
What's on the rock

Quartz

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

Gypsum

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

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