A delicate and fine Dolomite cast having two separate generations. The large scalenohedral shapes are hollow having just a thin skin of Dolomite that had covered what were likely Calcites, now long gone. The matrix is an earlier generation itself just a thin skin of tiny sparkling crystals. The Dolomite casts from Tsumeb were found in many exotic forms are are very collectable. This one is in perfect condition, esthetic and looks fine from all sides.
Topaz - Classic Colorado
Tarryall Mt, Park County
2.9 x 2.3 x 1.9 CM (thumbnail)
A very nice thumbnail with fine provenance. This was in the Warren Johansson Collection since September 1941, he obtained this from the legendary George M White. Warren was a student at that time and was very actively exchanging minerals while working on his Phd. George White is famed for his Topaz finds. This specimen has a flawless clear, undamaged Topaz crystal perched on contrasting matrix. A choice slice of mineral history.
Fluorite -dark zoned
Yaogangxian Mine, Yizhang County
4.1 x 3.3 x 2.5 CM (miniature)
very sharp single cube perched on a shard of matrix, mostly Muscovite. The Fluorite has very deep purple zones and masses on the outer edges the center core is transparent and a light blue color. Very glassy luster as in all the better Yaoganxian Fluorites. The display side is perfect damage wise, there is contacting and cleaves on the back. Better in person, this is from mining in the 2004-5 season when a very rich area was worked. The locality no longer produces anything like this.
Pyrite -octahedral on Quartz Classic USA
Emma Mine, Butte, Butte District, Silver Bow County
5.4 x 4.3 x 2.7 CM (small cabinet/ large miniature)
Octahedral Pyrite and milky Quartz in a classic combination from Butte. Additional dark sulphides are present but the main feature here is the lustrous Pyrites and elongated Quartz. In excellent condition which is rare in Butte pieces. Butte is one of the worlds greatest mining zones of the 19th and early 20th century. Good specimens are surprisingly rare, this is a nice one ex Les Hitchings collection.
Spangolite with Connellite
La Finosa Mine, Fontana Rossa, Ghisoni Corte, Haute Corse
6.2 x 4.8 x 1.7 CM (cabinet)
A nicely crystallized specimen from this less well known old mine in Corsica. Specimens of this size are very rare and few have crystals that are visible by naked eye. The crystals here are densely packed, cover a sizable area and are brightly colored. The backside is also mineralized but less richly.
ZCA Mine number 4, Balmat, Balmat-Edwards District, St. Lawrence, Co.
3.9 x 3 x 2.2 CM (miniature)
Ex. New York State Museum collection specimen with especially sharp, fine crystals. The cubic habit Magnetites from Balmat are renowned as unique in the mineral world. This is a superb specimen with sharp, complete and lustrous crystals. Very few of these are in such clean condition and the form of this is especially distinct. Most cubes show the stepped cubic striations and growth hillocks clearly.
Smithsonite with Mimetite
5.2 x 3.2 x 3 CM (small cabinet/ large miniature)
Cuprian Smithsonite from Tusmeb fills an open seam on the matrix and has partly covered several golden Mimetite crystals. In fine condition, ex. Loben collection (with label) collected in 1986, close to the end of the Tsumeb era. The Mimetites are the slender pointed type and the overgrowth of the Smithsonite crystals is like a cloak. Great luster and excellent condition, the paragenesis is especially clear on this specimen.
Spania Dolina, Banska Bystrica County
Banska Bystrica Region,
6.2 x 3.9 x 3.1 CM (small cabinet/ large miniature)
A fairly dense deep blue color mass of crystalized Posnjakite from Spania Dolina. This ancient Copper mine has been worked for over 1000 years and probably even in the Neolithic era. At times known as Herrungrund (German periods often seen on old labels). This deposit is very large and has many old mines along a belt of several kilometers. This zone has produced a number of colorful Copper species along the oxidized zone of the deposit. Thgis is a choice specimen for the area.