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Andradite & Hedenbergite

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MGR749682

Andradite & Hedenbergite

Classic Locality

Description Tabs

Description
Locality: 
Avissalos, Serifos Island, Milos, South Aegean, Greece
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 2 × 1.9 cm
Description

Field collecting on Serifos island is prohibited, collectors who tried to dig were even arrested from the local police; so no new material can be expected and all we have are specimen from old discoveries - material is relly limited and good pieces are more and more difficult to obtain! This particular specimen shows an isolated, complete crystal - freestanding at the top of hedenbergite matrix with minor quartz at one side.

Mineral Data
What's on the rock

Andradite

Formula: 
Ca3Fe3+2(SiO4)3
Strunz: 
9.AD.25
Crystal System: 
Isometric
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Drammen, Buskerud, Norway

Hedenbergite

Formula: 
CaFe2+Si2O6
Group Parent: 
Clinopyroxene Subgroup
Strunz: 
9.DA.15
Hardness: 
5.5 - 6.5
Type Locality: 
Mormorsgruvan, Tunaberg Cu-Co Ore Field, Tunaberg, Nyköping, Södermanland, Sweden