SKU: S_00058
A very rare specimen of Protochabournéite originating from its type locality. On a light matrix, there is a very distinct concentration of this extremely rare mineral. Protochabournéite has formed here as a dark gray, massive aggregate with a metallic luster, located in the upper part of the specimen and strongly contrasting with the background of the host rock. Main Features: extremely rare mineral; Type Locality; exposed, metallic concentration of ore on a light matrix; high systematic value Condition: Good.
Price: 57 EUR (249 PLN)
Availability: In stock
Location: Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy
Size: 50 x 35 x 110 mm
Weight: 39 g
Chemical formula: Tl₄-xPb₂+₂xSb₂₀-x-yAsyS₃₄ (with 0.02 ≤ x ≤ 0.34, 5.71 ≤ y ≤ 6.69)
Crystal system: Trigonalny
Mohs hardness: 2.5