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Willemite

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RSL879575

Willemite

Fluorescent

Description Tabs

Description
Locality: 
Can Rovira Quarry, Sant Fost de Campsentelles, Barcelona, Catalonia, Spain
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.4 × 2.5 × 2.2 cm
Description

The Sant Fost willemite appears in small crystals with a pseudohexagonal prismatic habit (twinned), with striated faces. All of them are sub-millimeter in size and form druses of crystals with a resinous or adamantine luster, with colors ranging from dark brown to honey-yellow, or they may appear colorless and transparent. In Sant Fost the willemite appears associated to a sphalerite vein together with silicates (quartz and clays), calcite, fluorite, and baryte. Very unusual locality for the species.

Mineral Data
What's on the rock

Willemite

Formula: 
Zn2SiO4
Strunz: 
9.AA.05
Hardness: 
5.5
Streak: 
White
Type Locality: 
Vieille Montagne (Altenberg; Kelmisberg), Moresnet, Kelmis, Plombières-Vieille Montagne District (Plombières-Altenberg), Verviers, Liège Province, Belgium