Axinite - Gemmy crystals
New Melones Spillway (Dam site), Calaveras County
3.8 x 2.3 x 2.3 CM (small miniature/ large thumbnail (toenail))
A very glassy cluster of transparent Axinite crystals from the collection of Brett Keller (Mineral wines). The new Melones Spillway of Calaveras county had a small but exceptional find in the 1970's. The Axinite (Ferro-Axinite) are considered to be among the best ever found in the USA. This piece is A choice small miniature that could perhaps be trimmed to thumbnail size. It has choice color, luster and transparency. No damage seen by naked eye but with a good loupe a few micro rough bits can be found. This is in far better condition than most, very close to full perfect.
Native Silver (Sheet form)
Eisleben, Mansfeld Basin
7.6 x 2.6 x 1.9 CM (cabinet)
One of the more odd forms of Silver are these thin sheets, almost like a Silver foil found in narrow seams of Slate. Very old material, these were mostly extracted in the early 1900's, the locality is a German classic. The Slate matrix is Copper bearing which is an unusual host for Silver anyplace. The Silver leaf is partly peeling from the matrix and shows the delicate form, being under .05MM thick.
Bunker Hill Mine, Kellogg, Coeur dAlene District, Shosone County
4.8 x 3.7 x 2 CM (miniature)
A wet-look Pyromorphite from Bunker Hill with light orange to straw color crystals. Ex Rosewarne Collection, this has crystals up to 1.8 CM most having the slightly "melted" look on some edges and faces. In fine condition overall, the crystals are quite translucent and when backlit they glow yellow . Bunker Hill is now recognized as one of the worlds greatest sources of Pyromorphites and the range of color was especially significant. Orange color Pyromorphite is rare worldwide but Bunker Hill did produce many impressive pieces, reputedly due to higher levels of Arsenic but that seems to be in dispute. No matter why these are wonderful Pyros, modern classics and there are no more coming out.
Flower-like cluster of well crystalized Silver minerals perched on a sparkling white plate of Calcite. Esthetic composition with nice contrast as well. The largest crystals in the cluster are the Pyrargyrites which reach over 8MM and are the flat terminated habit. These are quite dark as almost all red color is gone, but with nice distinct form. The Polybasite crystals are more numerous but smaller, most showing the classic flat hexagonal habit. With a loupe there is some damage seen on the delicate thin edges of some Polybasites, Overall the main Silver specie cluster is excellent by naked eye and a few small balls of Calcite decorate the darker minerals nicely. Ex Charles M. Noll collection his label is included.
Tantara Mine, Shinkolobwe, Kambove District
Democratic Republic of Congo (Zaire)
3.3 x 2.8 x 1.8 CM (small miniature/ large thumbnail (toenail))
Emerald green and glassy Dioptase crystals in a very nice cluster from the Tantara Mine (Katanga). The largest crystal is just under 2 CM, there is no matrix just pure Dioptase in very good condition as seen. The Dioptase from Congo does not have the ultra bright luster of a fine Tsumeb specimen but can be a bit brighter than many from Kaokoveldt. This piece is of that sort, better in person and quite esthetic. Congo Dioptase is not often available, it seems to be found every decade or so in small batches and then there are none for years. This was mined in 2012.
A fine, well crystalized old Danburite from Russell, New York. A classic of the Historic St. Lawrence County region, this specimen is from the late Ingeborg Burggraf collection. Several zones on the matrix host dense clusters of Danburite crystals with several habits, most being transparent to translucent and fairly glassy. The crystals reach over 1.3 CM though the majority are smaller. Uncommon on the market, the clear type like this are usually somewhat smaller in size this is well above average for quality.
Cobaltoan Calcite with Malachite
Kolwezi, Katanga Copper Crescent
Democratic Republic of Congo (Zaire)
4 x 3.7 x 3.5 CM (small miniature)
A small, colorful and cute specimen from the Katanga Crescent (not the more common Moroccan type). There are two separate vugs on this piece with brightly sparkling purple-pink crystals and a few sprays of green Malachite adding contrast. Some bruising on edges is noted but still a pretty and affordable small piece.
stock #20 AE-7-082 B
Parun Pegmatite Field, Wama District
5.4 x 3.2 x 3.1 (cabinet)
A big, glassy crystal with a very dark blue-green shaft becomes a lighter blue near the top, then grades to a water clear zone and ends with a thin reddish purple cap. Well terminated with a transparent flat top and with great luster. In very good condition, with only very tiny bits of edge wear that is not easy to spot and a small unobtrusive chip on the back. An older piece this color combination is not very common. The top portion is all gem clear but the majority of the crystal is rather dark and only a little light passes through. Displays well and a good value for a stout single crystal. A hefty 106 grams.