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FROM : Four la Brouque, Puy De Dôme, France
SIZE : 4.7 x 2.5 x 1.9 cm
This sample is an amber brown barytine. It has a sceptre shape ( the crystal developped around an another crystal's top, giving to it a sceptre shape).
This barytine was discovered in 1996 in Four la Brouque in le Puy de Dôme in France by Pierre-Jacques Chiappero. He gave it to the Muséum national d'Histoire naturelle a few years later.
It is today kept in the storage rooms of the collections of the Muséum (i.e., not yet displayed to the public).
Photography: A. Dahmane / Photo Saint-Hilaire, © MNHN.
SPECIE : Barite
HISTORY : Name inspired by the Greek word "βαρυσ" [barys] meaning heavy. In reference to its high density
Species first described in 1800 by Dietrich Ludwig Gustav Karsten (1768-1810), German matematician
Type-locality: undefined because species already known by the Ancients
ANCIENT NAME : Baryte
CHEMICAL FORMULA : Ba SO4
CRYSTAL SYSTEM : Orthorhombic
COLOR : Colorless, brown, blue, green, reddish yellow
DIAPHANIETY : Transparent to opaque
LUSTER : Vitreux to resineous
STREAK : White
MORPHOLOGY : Tabular crystals, prismatic. As roses, massive, lamellar, stalactitic
HARDNESS : 3,0-3,5
DENSITY : 4,47
CHEMICAL CLASS : VI - Sulfates, chromates
GROUP : Barytine
STRUNZ CLASS BEFORE 2001 : 6/A.09-20
STRUNZ CLASS AFTER 2001 : 7.AD.35
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