A very interesting specimen of sphalerite that shows a very aesthetic cyclic twin, unusual for the species and for this classic mine. Very brlliant, with galena crystals on matrix.

Aesthetic specimen of calcite crystals that form this semi-globular aggregate, with luster. It is accompanied by a small matrix with quartz and chalcopyrite crystals. A classic from the Romanian mine of Boldut; from the A. Trigo collection (Mataró). It shows an intense fluorescence under LW-UV light.

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Nice specimen formed by rosette aggregates of rhodochrosite, with a delicate pink tone, accompanied by tetrahedrite and chalcopyrite crystals. On a matrix with quartz.

Group of small, shiny, gray metallic blades of flattened Chalcostibite crystals, some of them very aerial disposed. Accompanied by brilliant Tetrahedrite and Quartz. Chalcostibite was uncommon at Cavnic mine till 90's finding.