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Quartz

MNHN N°207.5

visu_503 infos

FROM : Saint Sorlin d'Arves, Savoie, France
SIZE : 18 x 5 x 1 cm

general description

This sample shows hyaline quartz crystals that have the particularity of being developed around a shist. One can easely observe dark nodules inside quartz.

This sample comes from Saint Sorlin d'Arves, Savoie, in France. It was offered to the Muséum national d'Histoire naturelle by an amateur collector. It is kept in the storage rooms of the collections (i.e., not yet displayed to the public).

Photographie : A. Dahmane / Photo Saint-Hilaire, © MNHN.

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The Species page

Identity card

SPECIE : Quartz

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, violet, black, yellow
DIAPHANIETY : Transparent to opaque
LUSTER : Vitreous to greasy
STREAK : White
MORPHOLOGY : Prismatic crystals, massive, forming aggregates
HARDNESS : 7
DENSITY : 2,66

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

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