Gersdorfite 7.20 ct. Superman Cut 12.50 x 10.00 x 5.80 mm Slovakia Y99883

Description

Gersdorfite 7.20 ct. Superman Cut 12.50 x 10.00 x 5.80 mm Slovakia Y99883

Gersdorfite

Is a Nickel Arsenic Sulfide mineral with formula NiAsS and hardness of 5.5.

Associate minerals in green are the Annabergite ( hydrous nickel arsenate ,formula Ni3( AsO4)2·8H2O ) and Pecoraite, another Nickel Silicate mineral with formula Ni3(Si2O5)(OH)4. It has a metallic look with porosity,therefore the polishing is not great.

It comes from Prakovce,Gelnica Co., Košice Region,Slovakia