Cetineite Crystals

Cetineite Crystals. Collection and photograph: Christian Rewitzer

 Cetineite

A hexagonal-pyramidal mineral containing antimony, hydrogen, oxygen, potassium, sodium, and sulfur.

Formula: (K,Na)₆Sb³⁺₁₂(Sb³⁺S₃)₂O₁₈(OH)_0.5 · 5,5H₂O

Colour: Orange-red
Lustre: Resinous
Hardness: 3½
Specific Gravity: 4.21 (Calculated)
Crystal System: Hexagonal 

 

Cetineite was named after the Cetine mine in Italy, where it was first discovered. 

Locality: Le Cetine di Cotorniano Mine (Le Cetine Mine; Cetine Mine; Rosia), Chiusdino, Siena Province, Tuscany, Italy