Semseyite specimens for sale

10 for sale · $100–$3,000 USD

7 in the gallery

Semseyite is a sulfantimonide mineral consisting of lead, antimony, and sulfur. It forms metallic, often dark gray to black crystals with a sometimes stepped or tabular habit and a bright to sub-metallic luster that can catch the light in mineral cabinets. Crystals are commonly embedded in matrix or occur as sizable but intricate aggregates, reflecting a complex crystal structure built from layered sulfide motifs.

Formula
Pb9Sb8S21

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Where Semseyite is found

Top localities

  1. Herja Mine6 specimens
  2. Baia Sprie1 specimen
  3. Cavnic1 specimen

About Semseyite

Notable collections include specimens from Romania, Bolivia, and parts of the United Kingdom, where distinctive, well-formed crystals have drawn interest from collectors. The mineral’s rarity and the challenge of finding sharp, lustrous pieces contribute to its appeal, especially when specimens display clear termination faces and a convincing metallic sheen. When clean and well-terminated, semseyite can present a striking contrast against host rock, making it a prized addition for cabinet displays and reference collections.