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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

Occurrence: From an antimony deposit in highly silicified evaporites, on ore which has been roasted, then long weathered.
Association: Mopungite, s´enarmontite

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

The specimen in the photo is From: Le Cetine di Cotorniano Mine (Le Cetine Mine; Cetine Mine; Rosia), Chiusdino, Siena Province, Tuscany, Italy

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