Detailed sheet

pyrargyrite

Described in 1831 by Glocker, its name comes from the Greek “pyros” meaning fire and “Argyros” for money. It is a silver salt of a fire red color.



CHEMICAL CHARACTERISTICS

Ag3SbS3

silver sulphide and antimony



PHYSICAL CHARACTERISTICS

Main color

red

Other colors

grey

it becomes gray - black after prolonged exposure to light

Color of streak

red

Hardness

2.5 to 3.0

Density

2.88 to 3.08

Cleavage

good

Fracture

conchoidal, uneven

distinct cleavage only in one axe



OPTICAL PROPERTIES

Transparency

opaque, translucent

Refractive index

2.880 - 3.080

Double refraction

0.200

very strong uniaxial ( - )

visible double refraction

No

Dispersion

+

Pleochroism

very weak

Number of colors

2

shades of red

Fluorescence

none



CRYSTALS PROPERTIES

prismatic

crystals system

trigonal



OTHER INFORMATIONS

Exploited
sites

It is found in Bolivia (Potosi Mines), Peru (Huaron), Ecuador, Mexico (La Luz), Indonesia (Java Island), Germany, England (Cornwall) United States (Nevada , Idaho, California).

use in jewelry

Sensitive to light and fragile, it is only a collection stone.

Daily care
and precautions

It must be kept away from sunlight and ultraviolet rays

Other
Gems

Venez visitez

notre site web

voillot-joaillier.fr

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