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Quartz

Amethyst

MNHN N°206.193

visu_534 infos
FROM : Grand-Défens, Saint Raphaël, Var, France
SIZE : 27 x 27 x 34 mm

general description

This sample is an isolated crystal of amethyst variety quartz. The crystal is pale pink on its base and has a dark violet shade at its extremities. There are numerous inclusions inside the crystal: they are hematite.

The crystal measures 27 x 27 x 34 mm and comes from Grand-défens near Saint-Raphaël in le Var, France.
The Muséum national d’Histoire naturelle obtained this specimen thanks to support from Total.

This sample is today kept in the reserves of the storage rooms of the Muséum (i.e., not yet displayed to the public).

Photography: A. Dahmane / Photo Saint-Hilaire, © MNHN.
The Species page
Identity card
SPECIE : Quartz
VARIETY :Améthyste

HISTORY : Name inspired by "quarz", old german word "querch" meaning dwarf

Species known since Prehistory

Type-locality: undefined because species already known by the Ancients

CHEMICAL FORMULA : SiO2
CRYSTAL SYSTEM : Rhomboedric
COLOR : Colourless, white, pink, violett, black, yellow
DIAPHANIETY : Transparent to opaque
LUSTER : Vitreux to greasy
STREAK : White
MORPHOLOGY : Prismatic crystals, massive, forming aggregates
HARDNESS : 7
DENSITY : 2,66

CHEMICAL CLASS : IV - Oxides and hydroxide
GROUP : Quartz
STRUNZ CLASS BEFORE 2001 : 4/D.01-10
STRUNZ CLASS AFTER 2001 : 4.DA.05
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