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Quartz Psm Stibnite & Cervantite Psm Stibnite

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CLB503039

Quartz Psm Stibnite & Cervantite Psm Stibnite

Pseudomorph

Description Tabs

Description
Locality: 
Pereta Mine, Scansano, Grosseto Province, Tuscany, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Cabinet (10-18 cm)
Size: 
17.1 × 4.5 × 4.2 cm
Largest Crystal: 
17.10cm
Description

What an exciting and uncommon specimen: a bundle of large stibnite crystals was comletely replaced by quartz, except for a little black bud at the tip. Smaller quartz crystals have grown on this pseudomorph. One side shows stibnite crystals replaced by cervantite and/or stibiconite. First and only time I've come accross such a pseudomorph.

Mineral Data
What's on the rock

Quartz

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

Stibnite

Formula: 
Sb2S3
Strunz: 
2.DB.05
Hardness: 
2.0
Streak: 
Lead grey

Cervantite

Formula: 
Sb3+Sb5+O4
Strunz: 
4.DE.30
Hardness: 
4.0 - 5.0
Type Locality: 
Cervantes, Sierra de Ancares, Lugo, Galicia, Spain

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