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Demantoid

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BMM957222

Demantoid

Description Tabs

Description
Locality: 
Belqeys Mountain, Takab, West Azerbaijan Province, Iran
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2.2 × 1.5 cm
Description

Fantastic highly lustrous, dark emerald-colored demantoid garnets on matrix. Demantoid is the green gemstone variety of the mineral andradite, a member of the garnet group of minerals. This kind of andradite is very rare and therefore one of the most desirable gemstones. As mentioned above, is it characterized by its adamantine luster! Two forest-green andradite (v. demantoid) garnet crystals are perfectly placed on one side of this matrix specimen. The main crystal measures 14 mm. This specimen is in excellent condition. The crystal surfaces are high-gloss with a very fine structure. The appealing individual crystals sit exposed on a bright matrix, which makes this specimen a very beautiful and truly impressive sight!

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