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Adamite
>> Group(s) : arsenates
Described in 1886 by Charles Friedel who named it after the French mineralogist Gilbert Joseph Adam who found this mineral.
Its color depends on the metallic ions present : cuproadamite colored by copper is green, manganoadamite colored by manganese is pink-purple such as cobaltoadamite and aluminoadamite is blue.
Exploited sites
Historically found in Laurium, Greece. Deposits in France (Cap Garonne in Var department), in Chile, in Namibia (Tsumeb), the most beautiful ones come from Mexico (Ojuela mine, Durango).
Use in jewelry
gemstone for collectors, faceted.
Looking alike stones
apatite , aragonite , calcite , dolomite , fluorite , magnesite , smithsonite
Historical healing properties
This would be the stone of the throat chakra, also called energetical centre, link betwen the body and mind. The Adamite would promote the energy exchange both between the different organs and with the external. It would help in establishing and maintaining a good communication with friends and relatives.
zinc arsenate
Main color : yellow
Other colors : white, blue, brown, colourless, pink, green, purple
its color is due to the metallic ions present.
Color of streak : white
Luster : vitreous
Hardness : 3.5
Density : 4.30 to 4.70
Cleavage : good
Fracture : conchoidal, uneven
Transparency : transparent, translucent
Refractive Index : 1.710 - 1.760
Double refraction : 0.050
Definite, biaxial (+/-)
visible double refraction : yes
Dispersion : ++
Pleochroism : weak
Number of colors : 3
Light shades depending on the color, only 2 easily visible.
Fluorescence : moderate
The yellow and green varieties are fluorescent in green or yellow
Tabular crystals and radiating brillant spheroidal aggregates.
Crystal system : orthorhombic
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