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Chalcedony Psm Fluorite

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SUR30453

Chalcedony Psm Fluorite

Classic Locality

Description Tabs

Description
Locality: 
Wheal Mary Ann, Menheniot, Cornwall, United Kingdom
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 6 × 5 cm
Largest Crystal: 
2.00cm
Description

Pseudomorphs of chalcedony after fluorite octahedron's to 2cm along the edges.

There are both massive, yellowish white pseudomorphs as well as hollow epimorphs present on this 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
Surrey Minerals