Pierrotite, Weissbergite, thallium minerals; Lookout Pass, Utah, USA; 1 flat

Pierrotite, Weissbergite and other thallium minerals – 1 flat

This flat contains a representative selection of rare thallium minerals from the Lookout Pass Thallium Prospect in Utah, including Pierrotite, Weissbergite and other associated species typical for this locality. The specimens are mostly fine-grained to compact and display light, cream-coloured, grey or slightly brownish tones characteristic of this mineral group. Some pieces show clearly recognisable structural surface features, while others appear more massive, reflecting the natural variability of the mineralisation. This selection is ideal for collectors interested in rare and geochemically significant mineral species.

Geology & origin

Lookout Pass in Tooele County, Utah, is one of the few localities worldwide where several thallium minerals occur together. Confirmed species include Pierrotite (TlFe³⁺₂(As,Sb)₅S₉) and Weissbergite (TlSbS₂). The mineralisation belongs to a thallium- and antimony-rich sulphide association that has been scientifically documented in this area for many years. Utah is considered an important region for rare sulphidic thallium minerals, which are known from only a small number of occurrences worldwide.

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The flat and the folding boxes are not included but can be purchased separately.

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Usage Instructions

This product is ideal as a collector's item, decorative element, teaching material, or for scientific and exhibition purposes.