Silvery, octahedral crystals of rare Siegenite. Siegenite is a cobalt nickel sulfide that is one of the rarer and most sought after minerals from Missouri's Viburnum Trend. This is nothing but solid Siegenite without matrix.

Translucent green Prehnite on white Calcite on basalt from Scotland. The locality is an old quarry near Glasgow that was originally mined for copper. Ex. Allen Winans collection.

Botryoidal Mottramite from the big find in 2011 at the Ojuela Mine that produced some of the world's best Mottramite. The Mottramite has a green/yellow color and a somewhat organic-looking appearance.

Large coral-like cluster of white Calcite from Bisbee, Arizona. Rounded, branching growths of opaque white Calcite that radiate out from the base and morph into translucent bladed Calcite crystals in areas. I've never had a specimen that looks more like a piece of coral than this! A beautiful, historic specimen from the Artem Kovalev collection.

Large single compound crystal of Pyromorphite from the Friedrichssegen Mine in Germany. The specimen has the classic form and color for the mine.  There are two missing crystals in the lower center area, otherwise in pristine condition all around. Comes with an old Gene Schlepp label.

Massive Calcite, Prehnite and Copper with a crystallized vug of the same species. There is a large 4cm Copper crystal in the vug as well as a mass of Prehnite that rises up and contains 2 well formed Copper crystals to 2.5cm wide.