Bournonite is so often twinned or in classic "cogs-wheel" form that untwinned crystals are quite rare. This Quiruvilca (Peru) specimen is that unusual sort, here are many Bournonite crystals, some over 1.2 cm but no twins. In fine condition overall most crystals are perfect but with good magnification some small areas of rough edges are found. For this notoriously fragile specie that is impressive. Some bright golden pyrite adds contrast to the dark silver-metallic Bournonite. For some reason the Pyrite at Quiruvilca Mine is often especially bright and lustrous, it seems to be more stable than most and keeps the bright golden color much better than any other Pyrite I know. A fine addition to a serious Sulfide collection
A flat habit rhombohedral crystal of Rhodochrosite sits aesthetically on matrix. Tiny purple Fluorite and Pyrite is also on the front face of the Rhodo adding some character. The matrix has clusters of elongated white Apatites (not visible in the photos) mostly on the backside. These are vividly fluorescent (yellow) in long wave. The condition is excellent and the Rhodo is partly transparent. Better color than is usually seen, this piece was from the earliest finds of Rhodochrosite at Wudong. I do not think any Apatites were found in the later pockets.
A killer quartz "tree" or tangled shrub of slender Quartz crystals with a mint-green color perched on a matrix of large Dolomite crystals. Mined in 2006 at the famed Shangbao Mine, this is a really distinctive display piece. Many of the Quartz are doubly terminated and the condition overall is excellent. Shangbao is justly famous for some of the best Fluorites in the world. However, there were also a few finds over the years of highly esthetic and often odd Quartz. A unique piece that mixes fine quality, good size and display impact.
Dioptase - type locality
Altyn-Tyube, Kirghiz Steppes
5.8 x 4.1 3.6 CM (cabinet)
Like green eggs in a nest, a pair of very well-exposed Dioptase crystals from the classic Altyn-Tyube Mine. This is the type locality for the specie. The crystals are complete, well-formed, doubly terminated and undamaged. The overall esthetics are super for the locality and at 1.3 cm these are bigger than average.
Geometrically aligned Galena crystals dominate this complex multi-specie piece from the famed Madan area. We have been awed by the diversity and quality of Galenas and Sphalerites from Madan, which is probably the world's best source for these. Every few years a new habit or style is found. This was mined in 2009, it is in perfect, undamaged condition. The Galena Luster is dull metallic which is contrasted by the bright Sphalerite and Chalcopyrite. It is easy to understand why some collectors love Sulfides and especially Galenas.
Mefis, Taouz, Errachidia Province
4.3 x 3.3 x 1.2 CM (miniature)
Glassy and transparent, a thick tabular habit Barite with inclusions. This find a few years ago produced some large crystals that were mostly milky and somewhat crude. We obtained a few that were more sharp, defined and clear though smaller than average from the find. These sold quickly but we have this piece back via a collection purchase. This is one of the best.
Super bright Barite crystals from Jinkouhe Ex. John Marshall collection. John obtained this in 2003 when the first and best finds had just been made. In incredible condition, no damage seen by naked eye but with magnification some very small edge scuff are found, really close to perfect. The crystals are all transparent with a nice bright color, most have cloud-like inclusions as phantoms in some. Previous labels and collection card are included. I have seen nothing like this from China for a long time.
Calcite on Galena and Chalcopyrite
Sweetwater Mine, Reynolds County
5.1 x 4.8 x 3.7 CM (small cabinet/ large miniature)
A flawless, gem clear Calcite crystal sits well-exposed on a crystallized Galena and Chalcopyrite matrix. From the Sweetwater Mine (Missouri, USA) Ex. Larry White collection, the Calcite is clear enough that the matrix is seen through the crystal. Sweetwater Mine is famed for its Calcites which often have slightly curved faces. This specimen has some but most faces are perfectly flat and have glassy luster. Best appreciated in person, a fine miniature and great value.