Mineralpedia Details for Scainiite

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Scainiite

Named for engineer and investigator of systematic and Italian mineralogy, Dr. Giuseppe Scaini. Scainiite appears as opaque black acicular crystals with a bluish metallic luster and a dark red tint. It can be found as crystals in its type locality at the Buca della Vena mine in Tuscany, Italy, and as very rich specimens in association with zinkenite from an antimony-gold ore at Dubrava in Slovakia.

Ref. Minerals and their Localities, Bernard, J.H. and Hyršl, J. (2004)

IMA/CNMNC List of Mineral Names (2009) and European Journal of Mineralogy 11 (1999), 949

Formula: Pb₁₄Sb₃₀S₅₄O₅
Crystal System: Monoclinic
Crystal Habit: Acicular
Luster: Metallic
Color: bluish black
Streak: probably black
Class: Monoclinic - Prismatic
Fracture: Brittle - Irregular
Hardness: -
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Scainiite from Buca della Vena mine, Apuan Alps, Lucca prov., Tuscany, Italy

Excellent silvery, metallic sprays to 2mm in vug.

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Scainiite from Ludovít mine, Dúbrava, Žilina, Slovakia

Dark grey compact fibrous masses composed of tiny acicular crystals in areas of 3x2cm on both sides. The specimen is a very rich large specimen. Scainite is a rather rare lead-antimony sulfide which occurs at six places in Slovakia and one in Tuscany, Italy.