Unusually sharp, lustrous (for Columbite) and perfectly terminated, this is a choice single crystal of the specie. Ex University of Delaware Museum, the condition is outstanding especially given the fragility of Columbite. A heavy piece (just over 74 grams despite the small size), a textbook perfect example from the Brazilian pegmatites of Rio Doce.
Very fine light yellow-green crystals of Adamite arranged in the "pinwheel" type of radiating spray. A choice miniature in excellent undamaged condition from the classic finds about 20 years ago at Mina Ojuela. Good Mexican Adamites were once rather plentiful but this quality and form were never common. These are now quite hard to find and this is an especially elegant and esthetic piece. The radiating sprays exceed 2 CM across, these contrast with the gossan matrix. Displays well from most any angle, and the matrix is not the ultra fragile, crumbly type.
Dioptase on Calcite
stock #19.1-900
Tsumeb
Otjikoto Region,
Namibia
4.7 x 2 x 1.7 CM (miniature)
price: $460
Early summer 2023
Sharp gem clear crystals of bright Green Dioptase on contrasting Calcite. A Tsumeb classic, in fine undamaged condition and with well-isolated crystals. Tsumeb produced many great Dioptase but the most desired are those on the white Calcite like this. The vivid green with glassy luster stand out well. Small but impressive and relatively affordable. This is far more pretty in person.
Esthetic old miniature with a large number of associated species. Most obvious is the scattering of pink Rhodochrosite rhombs in singles and clusters on Quartz crystals. The dark ball-like structures are rosettes and groups of sharply crystalized Chalcocite. Under magnification nearly all crystals seen are twins and have a flat hexagonal form. These are really fine from most any angle but obviously tiny and best appreciated under magnification. The specimen is is excellent condition as seen, it has a very old label from a French collection which misidentifies the Rhodochrosite as Rhodonite. We checked it. Cananea is a mining locality that has been active since the 1700 era and still has some active sites. Very little is seen today in specimens, pieces like this date back to the pre 1950 era, and can be far older.
Sphalerite on Siderite - German classic
stock #22.FC-020
Neudorf, Harzgerode, Harz
Saxony- Anhalt,
Germany
4 x 2.7 x 1.7 CM (miniature)
price: $1660
Early summer 2023
Choice, lustrous and quite rare, fine Sphalerite from the famed Neudorf Mines. This locale was worked for Silver and Lead mostly in the 18th century and closed in 1903. The mine is renowned for some of the world's best Galenas and Bournonites from that era which are among the world's great mineral treasures. Sphalerite however is far more rare from this locality, and good examples are almost never seen. This piece has a main crystal just under 2 CM in size, the Siderite is crystalized as yellow to brown rhombs and makes a nice contrast. The Sphalerites are mostly a lustrous black but at the right angles there are bright flashes of red color. A fine and very old miniature of this classic locale.
Fluorite - spherical crystals on Quartz
stock #22.1-257
Namakwa
Northern Cape Province,
South Africa
4.4 x 2.6 x 1.6 CM (miniature)
price: $290
Early summer 2023
Fluorite balls on contrasting matrix with smaller gemmy cubes as well. The Fluorites are a deep purple, translucent, and the spheres show well-defined stepping modifications and crystalline structures under magnification. Fluorite balls are known from several localities but it is rare to see the crystal structure that created them, these spheres show very well the modifications that caused these to be round. In excellent condition.
Vanadinite, Mimetite and Mottramite
stock #19.1-891
Tiger, Mammoth St Anthony District, Pinal County
Arizona,
United States
4.3 x 3.6 x 2.5 CM (miniature)
price: $200
Early summer 2023
Bright, colorful and sparkling multi-specie specimen from the great Tiger (Mammoth-St.Anthony) of Arizona. Vivid red Vanadinites, sharp dark green to yellow-brown Mottramite and yellow Mimetite are the main components. Tiger Minerals are more or less legendary, the locality is unique in its complex mineralogy and beloved by many. This specimen looks nice on display but under magnification it is truly incredible.
Fluorite - vivid red Alpine
stock #23.FC-087
Pointe Kurtz, Mt Blanc region, Chamonix, Benneville,
Auvergne-Rhône-Alpes,
France
5.1 x 4.7 x 1.9 CM (miniature)
price: $3800
Early summer 2023
A rare and super impressive dark raspberry-red Fluorite from the high Alps. This rich color is incredibly rare and this is a fine example that looks much like a Rhodochrosite from a distance. This piece has minimal Quartz matrix and is mostly all Fluorite, it is fully translucent and will glow a deep red-pink with backlighting. These photos are not backlit so they show typical display conditions for this piece. These octahedral crystals are slightly frosted and have a wet look. These are mostly over 1 CM across in a tightly clustered grouping. From the find at Pointe Kurtz above Chamonix (French Alps), very few had this deep color, most were a typical pale pink. In very good condition, even though there are some small typical rough spots as usual in these clefts. As seen in the photos this is minor and not distracting. Overall an excellent display worthy specimen. The Pointe Kurtz is near the summit of Aguille Rouge in the Mt Blanc zone with an elevation of 3680 meters though the Fluorite was found a bit below that height. Collecting in this region is incredibly technical and requires impressive dedication as well as excellent mountaineering skills. Such specimens are the rare rewards.
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