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Aragonite

Aragonite MHNH N°207.28

MHNH N°207.28

visu_467 infos
FROM : Saint Pierre de Mésage, Basse Romanche, Isère, France
SIZE : 3.5 x 3 x 2.5 cm

general description

This specimen is a aragonite of the "flos-ferri" type (iron flower). The aragonite takes here a ramified and intersected shape. It is white and opaque.

It arises from Saint-Pierre de Mésage in Isere and could be acquired thanks to support from Total. It is kept in the storage rooms of the collections of the Muséum national d'Histoire naturelle (i.e., not yet displayed to the public).

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

HISTORY : Named after its type-locality: Molina de Aragón, Spain

Species first described in 1796 by Abraham Gottlob Werner (1749-1817), German geologist

Type-locality: Molina de Aragón, Spain

CHEMICAL FORMULA : Ca CO3
CRYSTAL SYSTEM : Orthorhombic
COLOR : Colorless, white, gray, brown
DIAPHANIETY : Transparent to translucent
LUSTER : Vitreous
STREAK : White
MORPHOLOGY : Prismatic crystals, sometimes flattened, acicular
HARDNESS : 3,5-4,0
DENSITY : 2,93

CHEMICAL CLASS : V - Carbonates, nitrates
GROUP : Aragonite
STRUNZ CLASS BEFORE 2001 : 5/B.04-10
STRUNZ CLASS AFTER 2001 : 5.AB.15
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