Sulfur and Aragonite on Gypsum - Sicily, Italy

Locality: Cozzo Disi Mine (Cozzodisi Mine), Casteltermini, Agrigento Province, Sicily, Italy
Dimensions: 86*50*30mm/60g

Sicily and sulfur share a history that stretches back millennia. From ancient Roman industry to Renaissance trade, the island's volcanic geology made it one of the world's most significant sources of native sulfur for centuries. The mining era has long passed, but its finest specimens endure — now among the most coveted classics in the mineral collecting world.And nestled quietly among those golden crystals: gypsum — rarer still.

Compared to celestite associations, gypsum co-existing with native sulfur is a considerably more uncommon find. Transparent gypsum crystals either encase sulfur inclusions within their structure, or grow in close contact alongside it — the vivid lemon-yellow of sulfur set against the water-clear gypsum creating a striking, layered contrast. The resulting specimens are visually complex and immediately distinctive, a rare Sicilian combination that has earned its place in the permanent collections of major European natural history museums.

And when aragonite joins the assembly, the specimen gains one final surprise. Under long-wave UVA (365nm), the aragonite erupts in vivid pink fluorescence — a sudden bloom of rose-colored light set against sulfur's yellow and gypsum's clarity. Three minerals, three characters, one extraordinary specimen.

[Cozzo Disi Mine]
Sicily has been celebrated for its sulfur deposits since antiquity, and specimens from Cozzo Disi Mine exemplify why. Vivid yellow native sulfur crystals emerge with exceptional clarity, their facets sharp and luminous. Select pieces feature bituminous sulfur, adding textural depth to an already striking visual. Gypsum frequently co-occurs, creating natural mineral associations of quiet elegance. Each specimen carries both aesthetic impact and the weight of Sicily's storied mining heritage.