Muséum national d'histoire naturelle _ The species

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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Barytine

MNHN N°205.151

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