A medium yellow sharp sulfur crystal 3 cm on end is nestled inside a limestone vug lined with calcite crystals. Based on the rounded cut on one side, I imagine this specimen is a core sample. Acq. in 1997.

Brilliant dark sphalerite crystals with flashes of orange host calcite crystals on some of the faces, at the top and most of the rear of the specimen. Unfortunately the label just says Hardin County, Illinois. Acq in 1990.

Bright green spheres of conichalcite sit with sharp green crystals of zincolivenite that form tiny “bow ties”, on a limonite matrix. Acq. in 1997

Stacked crystals of brownish to orange siderite crystals with some iridescence sit on a bit of matrix. Actually very pretty for the mineral. Personally collected by Kidwell in 1999.

Thin and gemmy bladed crystals of celestite in parallel growth with sharp pointed phantoms, on a bit of matrix.

A floater specimen of calcite and quartz with one side showing calcites perched on a quartz crystal matrix and the other showing mostly calcite crystals with minor black sulfides. Pretty cool.

Olive green hexagonal crystals of pyromorphite associated with a few tabular wulfenite crystals. Actually a fairly uncommon association.

A very colorful specimen of medium green kolwezite crystals forming spheres, with deep green fibrous malachite crystals, on a matrix of pink cobaltoan calcites. Old material when the country was know as Zaire.

Black metallic crystals of chalcocite contrasting nicely on a grayish matrix  that’s coated by sparkling clear tiny quartz crystals.

Hot pink bladed crystals of rhodonite on massive rhodonite and sulfides.