A superb cabinet specimen of this very rare Copper Molybdenite ex John Marshall Collection. Sharp and well defined platy crystals are arranged in a radiating flower-like fan on contrasting matrix with zones of Cuprian Powellite. Good specimens of this quality are practically impossible to find now unless an older collection is being sold off. The original locality had an area less than a square meter that held a few clusters and that was it. That was more than a quarter century ago, this is now recognized as perhaps the most beautiful new mineral found in decades. Aptly named for the discoverer, Terry Szenics, pieces of this quality were limited to a few flats and were sold very quickly. This piece is far better than average and has a very well articulated crystal spray that reaches 3 CM. Excellent deep green color (some were much more pale) and bright luster. Since the original find this mineral has only been found in one other locality (Arizona) as micro crystals mostly under 1 MM and poorly defined. This is certainly the best specimen we have had.
Silver - wires with Quartz
Cobalt, Gowganda region, Timiskaming District
6.9 x 5.9 x 4.3 CM (cabinet)
Silver wires with tiny Quartz crystals coating and encasing some of the Silver. From the prolific Cobalt area this specimen is fairly old, it was sold by the Schortmann Brothers in the early 1960 era. The Quartz undermagnification is a sparkling druze of doubly terminated crystals many of which have a Cumberland habit. Close exam of the matrix shows that there is a lot more silver unclosed under layers of Quartz. The exposed area of wires is a dense nest with a few slender hairs rising to about 3 CM long. A choice, delicate and esthetic piece which looks better the more it is examined.
Euclase -blue crystals with Quartz
Lost Hope Mine, Mwami, Karol District
5.2 x 3.7 x 2.7 CM (small cabinet/large miniature)
A sizable cluster of Euclase crystals and sections of crystals on a nearly pure Euclase matrix. The color ranges from a light blue to a deep inky blue and the scattered Quartz crystals add a contrast. From the Lost Hope mine of Zimbabwe, this was found more than 40 years ago. The largest crystal is 2.6 CM in size but it must be noted it is closely encased in the matrix with only a few faces showing, and the better display angles do not present the best color zones. This is a sizable mass of Euclase with some gemmy areas and some nice striations on the larger faces, although the edges do have lots of cleavages and rough zones. Relatively affordable, the photos to me look a little bit better than the specimen in person but they are real with no photoshop tricks. A good value for this often very costly gem mineral.
Covellite with Pyrite Quartz
Leonard Mine, Butte, Silver Bow County
4.8 x 4.3 x 3 CM (miniature)
While Covellite is a fairly common Copper mineral, crystals are very rare and good crystals are really only known from two locales (Italy and Butte) both locales are gone forever, these are true classics. A nice old Leonard mine Covellite with several free standing crystals and choice patina. This has a vintage label (1940 era?) from Continental minerals. The Covellites on this piece are of the thin blade type, very delicate and are well intergrown. The iridescence is a purple to blue with some reddish hints, this displays especially well under strong lighting as the metallic patina is very bright. Much better in person.
A flower form composed of thin blades of Pyrrhotite crystals esthetically perched on sharp crystals of Arsenopyrite. A rare specie from the famed Yaoganxian mine these were found almost 2 decades ago, we have not seen any since. The main flower is 3 CM across with a dark metallic patina. The Arsenopyrite crystals are highly lustrous and sharp. Overall in fine condition, one edge of the main flower has what seems to be a small old rehealed break or edge contact, not at all distracting, otherwise the display side is perfect. A very choice Sulfide from anyplace and a superb piece for the legandary Yaoganxian or for that matter all of China.
Killer thumbnail with intense bright color and great esthetics. A cluster of Adamite crystals showing saturated color zoning and featuring a saturated Purple sector. In perfect, undamaged condition. The back side and a few other spots have some nice small balls of Austinite as well, an unusual combination that adds a bit to the overall interest. Purple Adamite from Mina Ojuela is one of the most desired of Mexican minerals, this color and quality is found rarely and prized.
Incredibly transparent. clear cubes of Fluorite on a sparkling Quartz matrix. The details of the matrix are perfectly visible seen through the Fluorite. In excellent condition the cubes have typical small edge bevels and light violet color with a slight hint of zoning. The result is the Fluorite is nearly invisible from some angles. From a small but excellent pocket found in 2017, this is an especially fine example from this remarkable locality, and an great Fluorite from any place at all.
Covellite with Pyrite
Leonard Mine, Butte, Silver Bow County
5.4 x 4.3 x 3.2 CM (cabinet)
Several free standing crystals of Covellite on different sides of the Pyrite matrix are showing dark blue patina. From the remarkable collection of John Marshall who worked at the mine from 1950 to 51. John worked as a miner despite his Harvard education he enjoyed the direct contact and collecting during his lunch breaks. His hand painted mark is on the specimen #1294. The crystals are quite lustrous and in rather good but not perfect condition as is typical for this delicate mineral, far better than average. The Pyrite is in both small octahedrons and other more complex pyritohedrons. The Covellites of Butte have always been prized and are hard to find with any quality and often incredibly costly when they are exceptional A good value.