It is found in nature as the minerals valentinite and senarmontite.
2.
A rich deposit of valentinite has been found in the Constantine province of Algeria.
3.
It occurs in association with cervantite, valentinite, kermesite, native antimony and stibnite.
4.
Valentinite was first described in 1845 for an occurrence in the Les Chalanches Mine, Allemont, Is�re, Rh�ne-Alpes, France.
5.
Kermesite is the result of partial oxidation between stibnite ( Sb 2 S 3 ) and other antimony oxides such as valentinite ( Sb 2 O 3 ) or stibiconite ( Sb 3 O 6 ( OH ) ).
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