STIBNITE

ABOUT THE SPECIMEN

A striking display of stibnite crystals growing out in all directions, in my mind resembling a field of swords. The main crystal sticks right out of the assemblage and ties it all together. While some of the other crystals are broken (normal considering the soft nature of the mineral), it's still a very fine sample for the locality. Băiuț specimens remain considerably scarcer than Herja or Baia Sprie examples, and the mines ceased operation decades ago, making authentic old-time material increasingly difficult to obtain.

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The Băiuț district sits within the Gutâi Mountains metallogenic belt, part of Romania's Neogene volcanic arc where hydrothermal activity peaked between 11-9 Ma. The Cizma Mine (also spelled Cisma) produced stibnite specimens primarily from the 1960s-1970s as divergent sprays of metallic-gray acicular crystals reaching 3-6 cm, typically on quartz-carbonate gangue. These form through epithermal base metal-gold vein systems where antimony sulfide precipitated during late-stage, lower-temperature crystallization phases. What distinguishes Băiuț stibnite from the better-known Baia Sprie and Herja material is the characteristic gunmetal luster and frequent association with white calcite or barite on matrix - specimens often display more robust, terminated crystal forms rather than the extremely elongated needles typical of neighboring localities. The district's hydrothermal veins formed along northeast-southwest trending structures related to sub-volcanic intrusions, with antimony concentrated in specific pockets that were irregularly distributed through the mining levels.