Muséum national d'histoire naturelle _ The species

FROM : Near Achubi, Pakistan
SIZE : 6,5 x 7cm. Crystal: 3.7cm

This sample shows milky white crystals of analcime on matrix, associated with prismatic crystals of brown zoisite. The largest crystal of analcime measures 3,7 cm in diameter. The whole sample measures 6.5 x 7 cm.

This specimen was discovered near Achubi in Pakistan. Thanks to support from Total, the specimen could be acquired by the Muséum national d’Histoire naturelle.

The sample is currently exposed in the Treasure Room, within the Gallery of Mineralogy of the Muséum.

Photography: Louis-Dominique Bayle, © MNHN.

SPECIE : Analcime

HISTORY : Name inspired by the Greek word [analkis] meaning weak, in reference to its weak electrical charge observed after rubbing it

Species first described in 1797 by René-Just Haüy (1743-1822), French mineralogist and cristallographer

Type-locality: Cyclope island, Sicile, Italie

CHEMICAL FORMULA : Na Al Si2O6 H2O
CRYSTAL SYSTEM : Triclinic
COLOR : Colourless, white, greenish, gray
DIAPHANIETY : Transparent to translucent
LUSTER : Vitreous
STREAK : White
MORPHOLOGY : Trapezohedric crystals, more often granular, compact, massive
HARDNESS : 5,0- 5,5
DENSITY : 2,271

CHEMICAL CLASS : VIII - Silicates
GROUP : Analcime
STRUNZ CLASS BEFORE 2001 : 8/J.27-10
STRUNZ CLASS AFTER 2001 : 9.GB.05

Explore the Mineral Treasures of the Muséum

Welcome to
the Virtual Gallery of Mineralogy

Analcime

Analcime

MNHN N°195.192

general description

The Species page

Mineralogy