 | "A rare crystal from this new location. Kermesite is an unusual sulfide mineral. A close look at the formula can confirm this. There is an oxygen nested between two antimonies and two sulfurs. Kermesite, it turns out, is an intermediate oxidation product between stibnite whose formula is Sb2S3, and various antimony oxides such as senarmontite, Sb2O3; valentinite, also Sb2O3; and stibiconite, Sb3O6(OH). Stibnite when exposed to oxygenated fluids under the right conditions will slowly transform into kermesite as the an oxygen replaces one of the sulfurs in the formula. Usually the oxidation is completed to the point that the sulfurs are completely replaced by oxygen, but in some rare cases the oxidation stops short and forms kermesite. This is fortunate for mineral collectors!" Location: Jiangshunm Guzhun Province, China
Size: 3.7 x 0.9 x 1.0 cm.
Weight: 0.2 lbs.
Quantity Available: 1 Price:
$99.00 |