anhydrite
violet anhydrite crystal from Simplon in Switzerland
growth plan type inclusions and iridescence of surface separation
Detailed sheet
anhydrite
Identified by Werner in 1804, its name comes from the Greek “anhydros” which means without water, as opposed to gypsum, which contains it.
A blue variety that comes from Peru is called Angelite.
Another variety from Italy (Costa Volpino in Lombardy) is called vulpinite.
CHEMICAL CHARACTERISTICS
Ca[SO4]
calcium sulfate
PHYSICAL CHARACTERISTICS
Main color
colourless
Other colors
white, blue, brown, grey, yellow, black, pink, red
Color of streak
white, grey
Luster
pearly, vitreous
Hardness
3.5 to 0.0
Density
2.90 to 2.99
Cleavage
perfect
Fracture
uneven
pearly on the cleavage
OPTICAL PROPERTIES
Transparency
translucent, transparent
Refractive index
1.570 - 1.615
Double refraction
0.040
definite, biaxial (+)
visible double refraction
Yes
Dispersion
0.013
Pleochroism
definite
Number of colors
3
colorless, yellow, pink, purple
Fluorescence
variable
some samples may show a red fluorescence
CRYSTALS PROPERTIES
prismatic, often in compact aggregates
crystals system
orthorhombic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is common and present in many deposits.
It is found in the Alps, Tyrol in Austria and France (Tarentaise valley in Bourg-Saint-Maurice), Canada, Germany, Hungary, the United States (California, Colorado …), Bolivia, Peru, Zaire, Namibia.
use in jewelry
Collection stone of low hardness and acid sensitive.
Historical
healing properties
On the throat chakra, it will soften it locally, but it’s for its energy action that is described: it would facilitate creative ideas among artists. It would also limit the impulsive reactions by providing smoothness and quietness. Its other name, the Angelite, suggests the soothing action she would have like the guardian angel of our life, his presence would reassure young children. It would protect from negative energies, would help to overcome challenges.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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