Complex, red-orange, shining crystals up to 1-2 mm wide of Villiaumite sitting in a cavity of phonolite matrix with green Tupersuatsiasite in association.
Formula :
NaF
System: cubic Hardness:2-2½ Rarity:rare
Strunz id:III/A.2-10 -
HALOGENIDES
Name origin: Named after Maxime Villiaume, French explorer and officer in the colonial artillery corps stationed in northern Madagascar, for his help in the acquisition of mineral and rock collections from Madagascar and Guinea. The species was first found in his collection.
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 Specimen weight:37 gr.
 Crystal size:up to 1-2 mm
 Overall size: 45mm x 37 mm x 35 mm
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