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Really finely crystallised specimen of bournonite with sharp black sphalerite crystals interspersed between the cog wheels. Lots of...

Nice sphalerite specimen with rock crystals.

A neat, elegant miniature specimen with classic association of sphalerite and quartz on galena base.

Very odd paragenesis comprising depressed terminated crystals of sphalerite with brassy green epitaxial chalcopyrite covering the internal...

A flat display showing metallic bright bournonite "cogwheels" nicely with some fairly sharp sphalerite crystals around the edges. Very nice...

Three sharp barrels of twinned bournonite crystals with a metallic grey luster sit on a bed of dark brown sphalerite crystals.

A very fine specimen from Peru with a rich coverage of lustrous tetrahedrite crystals up to 2 cm, greenish brown sphalerite crystals up to...

Very nice twinned lustrous sphalerite crystals up to 0.7 cm on top of this very nice little specimen with dozens of nice rhodochrosite...

Very nice, interestingly shaped calcite crystals and some chalcopyrite sitting on rather big shiny sphalerite crystals.

Matrix with grey prismatic hutchinsonite crystals associated with orange orpiment crystals and dark sphalerite crystals. The specimen will...

A matrix of sphalerite and pyrite which is at one side completely covered in calcite blades in fine condition.

A large representative piece of ore from a famous mine. This specimen has a good coverage of frosty quartz crystals up to 1.5 cm in length...

Silvery cogwheel crystals of bournonite to 9mm in a sulfide matrix.

Superb large terminated crystals of chalcopyrite with slightly iridescent sphalerite (and pyrite). A couple of tiny marks, dated 1982, with...

Excellent transparent sphalerite crystals, associateed with a few pyrite cubes and quartz needles. Far better in nature.

From classic locality here spry of lustrous prismatic hutchinsonite crystals to 7 mm with minor sphalerite & barite

Here it is a stunning piece from Peru. Large group of lustrous octahedron Pyrite crystals with minor galena and sphalerite. (10074)

cabinet specimen which has a rich covering of orange brown wurtzite crystals on sphalerite and many pyrite crystals.

Massed pyrrhotite leaves covered with little calcite crystals abutted to lustrous brown black sphalerite with smaller pyrite crystals.

Sparkling combination piece with mounds of bright small pyrite crystals with some jamesonite needles plus isolated brownish sphalerite...