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Grossular

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PDM719827

Grossular

Floater

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Description
Locality: 
Goudiri, Tambacounda Region, Senegal
Class: 
Single Crystal
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3.9 × 3.7 cm
Description

Damage-free, brown coloured grossular crystal of good size, with some transparency at the surface, and rounded aspect because the interactions of dodecahedron and trapezohedron faces. We specially remark here this locality in Senegal, quite uncommon in collections.

Acquired in 1991, this specimen is the third and last I have from the collection of Georges Vanacker* (#696). *Vanackerite (from Tsumeb) is named after him.

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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