Stibnite
>
Stibnite, sometimes called antimonite, is a sulfide mineral with the formula Sb₂S₃. This soft grey material crystallizes in an orthorhombic space group. It is the most important source for the metalloid antimony. Wikipedia
Chemical formula: Sb2S3
Cleavage: Perfect and easy on; imperfect on, and
Color: Lead-gray, tarnishing blackish or iridescent; in polished section, white
Crystal class: Dipyramidal (mmm); H-M symbol: (2/m 2/m 2/m)
Crystal habit: Massive, radiating and elongated crystals. Massive and granular
Crystal system: Orthorhombic
Diaphaneity: Opaque
Show more
Show less