International Minerals #28

Super sharp and super brilliant pyrrhotite crystal cluster on calcite, quartz and sphalerite. Minor galena is also present. All crystals are free of damage. Ex Oliver Konczer collection #722.

A clear and undamaged cube measuring 3.4 cm on edge perched on calcite crystals and iron oxides. The specimen is a complete floater and well crystalized on either side. The edges and corners of the fluorite feature lovely rhombohedral and octahedral bevels. A great piece for the advanced fluorite collector! Ex Oliver Konczer collection.

Wonderful sprays of lovely bright and vibrant green, primary malachites serve as a matrix for chrysocolla ps. barite crystals and clear yellow calcites. The specimen is a perfect floater and complete all around. The rear side is actually another very nice display side! Ex Oliver Konczer collection.

This is a large and very 3-dimensional aggregate of kidney ore from a classic English locality. The botryoidal crystal cluster in the center is truly very well exposed, much better than the picture shows it, and serves aa a wonderful focal point. No damages on the entire center region of the piece. The luster is exceptionally glossy, and the colour is a lovely reddish brown. Total weight: 4.3 kg. Ex Oliver Konczer collection #558.

A perfect floater of doubly terminated clinozoisite crystals! The piece comes from an old find, very few specimens have ever reached this level of clarity and bright, open colour. Another stunning piece from Oliver Konczer's collection, #17. No damage.

A very large 3.5 cm doubly terminated realgar crystal sits perfectly centered on a matrix made of stibnite and calcite. The specimen is a floater and perfectly crystalized on all sides. Oliver had bought the entire pocket of these wonderful realgar specimens when they came out, and he had kept this amazing miniature specimen in his private collection for good reasons. It is super aesthetic and one of the very best pieces from the find. Certainly it needs protection from the light, as all realgar pieces do.

A very rare doubly terminated lorenzenite crystal nicely sitting on mother rock. The crystal measures 3.5 cm tip to tip. Ex Oliver Konczer collection.

A beautiful cinnabar crystal sizzing on dolomite and quartz matrix. The crystal measures 1.7 cm across. Ex Oliver Konczer collection.

This is a superb miniature featuring sharp and large acanthite crystals in a very aesthetic composition. The focal crystal atop measures 2.7 x 2.7 cm. Ex Oliver Konczer collection.

A classic, honey coloured, twinned calcite crystal perched on top of a dolomite matrix. This specimen comes from the "Mineralien Museum der Humboldt Universität Berlin", two old labels are coming with the piece. The matrix is in fact much larger than shown on the picture, it is easily the size of the calcite crystal, possibly even a bit larger. No damage. A classic and very aesthetic specimen! Ex Oliver Konczer collection #417.

Huge and very well formed bethekhtinites on a matrix made of sparkling, drusy quartz crystals. The specimen is a floater and well crystalized all the way around. Amazing crystal size and wonderful composition! Ex Oliver Konczer collection #602.

What a stunning floater cluster of 2 generations of goethite crystals! The specimen is complete all around and very showy from multiple angles. My preferred angle is actually the exact opposite side of this wonderful picture taken by Albert Russ. Great aesthetics, no damage. Ex Oliver Konczer collection.