Hydrated sulphate containing hydroxyl
Specific gravity: 3.7 to 3.9
Hardness: 3½ to 4
Colour: Sky blue
Solubility: Moderately soluble in hydrochloric, sulphuric and nitric acid
Cyanotrichite is a secondary
copper mineral found sparsely in the oxidation zones of hypothermal
copper-bearing ore bodies rich in aluminium and sulphate. Associated minerals include
parnauite, azurite and
At the Cap Garonne mine, Le Pradet, Var, Provence-Alpes-Côte d'Azur, France, cyanotrichite occurs with chalcophyllite and parnauite (Dana).
At the Khder Mine, Ouisselsate Caïdat, Amerzgane Cercle, Ouarzazate Province, Drâa-Tafilalet Region, Morocco, cyanotrichite forms pale blue crusts on vein quartz, with many other secondary copper minerals (Minrec 38.5.371).
The type locality is the Moldova Nouă Mine, Moldova Nouă-Sasca Cu-Mo ore field, Caraş-Severin, Romania.
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