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Andradite & Quartz On Hedenbergite

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RHT651589

Andradite & Quartz On Hedenbergite

Classic Locality

Description Tabs

Description
Locality: 
Mega Horio, Serifos Island, Milos, South Aegean, Greece
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
13.8 × 9 × 4.5 cm
Weight: 
967.00gr
Description

A very big and one of the best andradite specimens from Serifos you might get. Hundereds of coffee-brown andradite crystals of several generations, added by four groups of nice quartz crystals. All set on massive, dark green hedenbergite.

Collecting today is forbidden on the whole Serifos island. Material is getting scarce.

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

Quartz

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

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