Sulfur on stalactitic aragonite, "Cozzo Disi" (Sicily) – Fluorescent and phosphorescent. A splendid specimen of native sulfur on stalactitic aragonite, originating from the famous Cozzo Disi mine in Casteltermini (Agrigento, Sicily, Italy). The specimen features a fascinating association between crystals and aggregates of bright yellow native sulfur—reaching sizes of up to approximately 3–4 cm—and stalactitic aragonite. Under 365 nm UV light, the aragonite exhibits a distinct pink fluorescence, followed by a clear phosphorescence (persistent glow) once the UV source is turned off, as can be clearly seen in the video. From a historic Sicilian collection, assembled over the course of several decades. Locality: Cozzo Disi Mine, Sicily, Italy Minerals: Native sulfur and stalactitic aragonite Sulfur crystal size: up to 4 cm Dimensions: 22 × 18 × 7 cm Weight: 2,700 g / 2.7 kg