Muséum national d'histoire naturelle _ The species

FROM : Jegdalek, Pakistan
SIZE : 8 x 5.4 cm; crystal: 3.7 x 1.4 x 0.8 cm

The prismatic crystam is pink-violet and measures 3.7 x 1.4 x 0.8 cm. Its white matrix of marble emphasis the ruby.

This ruby was acquired thanks to support from Total and comes from the mineral deposit of Jegdalek in Pakistan. It is currently exposed in the Treasure Room, within the Gallery of Mineralogy of the Muséum national d’Histoire naturelle.

Photography: Louis-Dominique Bayle, © MNHN.

SPECIE : Corundum
VARIETY :Rubis

HISTORY : Name inspired most likely by the tamoul "kurundam" and/or by the sanscrit "kuruvinda" meaning rubis

Species "discovered" in 1714 by Woodward near Bombay, India

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

CHEMICAL FORMULA : Al2 O3
CRYSTAL SYSTEM : Hexagonal
COLOR : Coulorless, white, red, blue, yellow
DIAPHANIETY : Transparent to translucent
LUSTER : Adamantine to vitreous
STREAK : White
MORPHOLOGY : Prismatic hexagonal crystals
HARDNESS : 9
DENSITY : 3,997

CHEMICAL CLASS : Name most likely from the
GROUP : Corundum
STRUNZ CLASS BEFORE 2001 : 4/C.04-10
STRUNZ CLASS AFTER 2001 : 4.CB.05

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Corundum

Ruby

MNHN N°198.7

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