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.
Wulfenite "windowpane" type
Rowley Mine, (Reliance Mine), Theba, Painted Rock District
1.8 x 1.6 x 1 CM (thumbnail)
A smaller thumbnail that has a super presentation. Two main Wulfenite windows are nicely perched on a sliver of crystalized Calcite matrix. Very tiny balls of red Mimetite add color so that at certain angles the Wulfenites are a more reddish or yellow depending on the perspective. In fine condition as seen, this looks great from several angles. The Rowley mine tended to have smaller and more delicate Wulfenites but they could be incredibly esthetic. A choice little piece with more display impact than might be expected.
Kinoite with Apophyllite
Christmas Mine, Dripping Springs Mountains, Gila County
6.5 x 5.5 x 3.6 CM (cabinet)
Royal blue Kinoite like this is best known in specimens from the Christmas Mine, it is rather rare elsewhere and almost only known as micro specimens. This piece is a very choice example with a good, dense coverage of brilliant blue crystals associated with clear colorless cubes of Apophyllite. This Calcium Copper Silicate is never found in large crystals but sometimes the clusters are rich enough (like on this piece) to be eyecatching from a distance. Far better than average, there are several separate vugs on different sides of this matrix and the crystals under magnification are especially brilliant.
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.
Old specimen collected by Les Hitchings in the early 1960 period. In remarkable condition a plate of matrix with very three dimensional and well positioned highlights. The Galena is especially choice, sharp and shows the typical alteration to Anglesite on the surface in unusually sharp well defined crystals. These are also Fluorescent bright yellow. The Fluorite shows well the stepped growth structure that is distinctive from this locale which is nearly spherical. In several spots on the matrix are tiny balls of Rosasite that while not very large add a touch of color on close exam. Great esthetics, a classic locale and in excellent condition.
SOLD Rhodochrosite -classic locale
stock #SOLD 13.1-242
Emma Mine, Butte, Butte District, Silver Bow County
2.6 x 2.4 x 1.9 CM (thumbnail)
From Butte during the glory days came a lot of Rhodochrosite best known from the Emma Mine. This thumbnail is especially choice with a well formed main rhomb that is unusually distinct and isolated. The matrix is composed of sharp smaller Rhombs and has a few tiny Quartz as accents. The color is quite a bit deeper pink than usual and the condition is excellent. Displays well from several angles. One of the worlds great mineral locales, Butte produced incredible Sulfide minerals many of which are not very colorful. The Rhodos add a bright exception to this.
Cliff Mine, Pheonix, Keweenaw County
16.1 x 2 x .5 CM (cabinet)
An antique native copper "finger" or "fan blade" made by skilled hand chiseling long ago. These artifacts were made by miners from the often huge masses of pure Copper encountered in the Upper Penninsula of Michigan. From the John Marshall collection, this is recorded as from the Cliff Mine, such attributions of these artifacts are quite uncommon. Aside from the very hard labor of hammering through solid copper, these fingers required a lot of skill to create such a long straight and clean blade. While not a typical mineral specimen this is a very much a classic Native Copper that has had a major trimming job!
Grand Reef Mine - Graham County
4.1 x 2.9 x 1.8 CM (miniature)
A miniature from the Grand Reef Mine hosting milky white Cerussites with the habit that looks much like a doubly terminated Quartz. The Cerussites are on a typical druzy Quartz matrix and are in very good condition. A nice locality piece, the Grand Reef Mine is well respected as a source of some uncommon Lead secondary minerals.