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Chalcedony Psm Fluorite

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PDM769467

Chalcedony Psm Fluorite

Pseudomorph

Description Tabs

Description
Locality: 
Wheal Mary Ann, Menheniot, Cornwall, United Kingdom
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.6 × 6.8 × 4.6 cm
Description

Rounded aggregate of octahedral fluorite crystals completely replaced by milky quartz. This Super Classic pseudomorph from Wheal Mary Ann is of excellent quality. The surface is partially covered by chalcedony with some tan coloured layers underneath. The octahedral form of the fluorite is very well-preserved. The largest crystal measures 1.8 cm across. Great old-time Cornish material.

Ex. David Baker, Ex. Paul De Bondt specimen.

Mineral Data
What's on the rock

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

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Seller Information

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