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Grossular

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PDM801403

Grossular

Type Locality

Description Tabs

Description
Locality: 
Akhtaragda River Mouth, Vilyui River Basin, Sakha Republic, Russian Federation
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.8 × 2.3 × 2 cm
Description

Floater group of crystals formed by a dominant elongated crystal of green colour and intense vitreous lustre. Habit is a trapezohedron {211}, with some vertices modified by a dodecahedron {110}. It is in very good condition, just with a contact with another crystal. Grossular is a common variety of garnet, but this specimen is from the remote Akhtaragda river mouth, the type locality for the species.

Acquired in 1994.

Mineral Data
What's on the rock

Grossular

Formula: 
Ca3Al2(SiO4)3
Strunz: 
9.AD.25
Hardness: 
6.5 - 7.0
Type Locality: 
Akhtaragda River mouth (Achtaragda River mouth), Vilyui River Basin (Vilui River Basin; Wilui River Basin), Sakha Republic (Saha Republic; Yakutia), Eastern-Siberian Region, Russia

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