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Demantoid & Calcite

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CLB220695

Demantoid & Calcite

Description Tabs

Description
Locality: 
Antetezambato, Antsakoamanondro, Ambanja, Diana, Madagascar
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.3 × 7.6 × 4.3 cm
Largest Crystal: 
0.90cm
Description

About three dozen very nice gemmy, mint- to dark green demantoid crystals on calcite. A very beautiful specimen. It is commonly known that a lot of the demantoid specimen from Madagascar are constructions, some so good they are real works of art. I could not detect any glue marks on this specimen, but cannot guarantee that none of the dematoid crystals is mounted. However you'll get a very nice looking specimen with the sum of the single demantoid crystals making it easily worth the pay.

Mineral Data
What's on the rock

Demantoid

Variety Of: 

Andradite

Formula: 
Ca3Fe3+2(SiO4)3
Strunz: 
9.AD.25
Hardness: 
6.5 - 7.0

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Seller Information

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