Minerals identify

Know how to recognize them

Kermesite

Oxysulfide

Kermesite or antimony oxysulfide is also known as red antimony (Sb2S2O). The mineral's color ranges from cherry red to a dark red to a black. Kermesite is the result of partial oxidation between stibnite (Sb2S3) and other antimony oxides such as valentinite (Sb2O3) or stibiconite (Sb3O6(OH)). Under certain conditions with oxygenated fluids the transformation of all sulfur to oxygen would occur but kermesite occurs when that transformation is halted.

Identification

Color of mineral

Red
Purple

Mohs scale ( mineral hardness )

1

The streak

Red

Density ( specific gravity )

2.72
2.74
2.74

Luster ( interacts light )

Adamantine
Metallic

Crystal ( diaphaneity )

Triclinic