International Minerals #28

A wonderful 6 cm botryoidal calcite aggregate on nicely contrasting dolomite matrix. Very 3-dimensional and complete on the sides. No damage. Ex Oliver Konczer collection.

This specimen features large and sharp cuboctahedral galena crystals on needle quartz. The etched areas and the bevels on the corners add very interesting crystal textures. The luster is just amazing on all sides! Great condition and contrast, ex Oliver Konczer collection.

A large and nicely isolated octahedral scheelite crystal resting on a bed of mica. The scheelite has an exceptionally deep orange colour. It is in pristine condition and measures 4.7 cm across. Great aesthetics and visual impact! Ex Oliver Konczer collection.

Very showy quartz crystals in uncommon combination and style. The crystals are covered by a final layer of truly white quartz and sitting on actinolite. All the crystal tips are in pristine condition. Ex Oliver Konczer collection.

Lovely spray of stibnite crystals on a small calcite matrix. Very showy all the way around! Ex Oliver Konczer collection.

A floater aggregate of doubly terminated, scalenohedral calcites is covered by beautiful, orange orpiment crystals on one side. The back side shows colourless, lustrous and translucent calcite crystals. No damage all the way around, ex Oliver Konczer collection #919.

Superb cluster of pagoda style calcite, partly covered by dark iron oxides. Great aesthetics and complete all around! No significant damage to report. Ex Oliver Konczer collection.

WOW! What a stunning babingtonite specimen! A perfect, doubly terminated crystal is perched on green prehnite crystals, fully undamaged and in freestanding, upright position. Several groups of clear quartz crystals attached in the center and on the sides add another pleasing contrast. The specimen is a floater and in perfect condition all around. Ex Oliver Konczer collection.

Sharp and well-defined bismuth crystals up to 11 mm wide form a very elegant and fully complete aggregate sitting on a matrix of little quartz crystals! The rear side is actually equally fine crystalized than the front shown here, possibly even better. Hence the piece can in fact be displayed in multiple ways. Ex "Mineralien-Niederlage der Bergakademie Freiberg, Sachsen" collection, their label is still coming with the piece. Ex Oliver Konczer coll. #139. A great classic specimen in very aesthetic shape!

What a huge and superb ilvaite crystal cluster! The specimen is in perfect condition and shape on all sides. Little quartzes and even a small purple fluorite are attached on the sides. The termination faces show wonderful stepped growth patterns. No damage.

A perfect quatz stalactite serves as a perfect stand for multiple doubly terminated apophyllite and heulandite crystals. Equally fine from any side. Fantastic aesthetics and great condition! Ex Oliver Konczer collection.

Large sphalerite crystals resting on a matrix of sparkling quartz crystals. The specimen is a complete floater and well crystalized on all sides, a small galena sits atop. The sphalerite crystals show quite complex crystal structures, numerous steps reveal a lovely hoppered texture. Overall a pristine and very showy specimen. Ex Oliver Konczer collection.