Sulphides: Rammelsbergit
Diagnostic card.
Ni As 2 (nickel arsenate)
Diamond orthogonality
Hardness 5,5-6
Specific weight 6,9-7,2
Cleavage distinct
Broken fracture
Color white with a pinkish tinge
Color in powder gray-black
Glitter metal
Presented in the form of dense masses of fine-grained, as well as radiant addition. Crystals are rare and always small. The color is tin-white with a light pinkish-red tinge.
Diagnostic signs.
In conditions of humidity, a green coating of annabergite may form.
Origin.
It occurs most often in association with nickel in Schneeberg in Saxony (Germany), Turtmanthal in Valeeuse (Switzerland), Cobalt in Ontario (Canada), Alto Akhman (Morocco), Saint-Marie-o-Mines in Alsace (France), Mohawk in the state of Michigan (USA) and Chile. In Italy, it is present in the Sarrabus mine (Sardinia region), Monte Cruzino in Val di Susa and near Usselio in Valedi View (Piemonte region), Cinqualley in Valsugana (Trentino region).
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Poisonous and radioactive dangerous stones and minerals
** - poisonous stones and minerals (mandatory check in the chemical laboratory + explicit indication of toxicity)
** - radioactive stones and minerals (mandatory check on the standard dosimeter + ban on open sales in case of radioactivity exceeding 24 milli / g / h + additional measures of population protection)
Catalog of minerals and semi-precious stones of the world by groups
** - poisonous stones and minerals
** - radioactive stones and minerals
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