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7 specimens listed
Page   1 |

Covellite with Pyrite Quartz
stock #18-AX-30-047
Leonard Mine, Butte, Silver Bow County
Montana, United States
4.8 x 4.3 x 3 CM (miniature)
price: $850


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.
Covellite with Pyrite
stock #0195-JM-1294
Leonard Mine, Butte, Silver Bow County
Montana, United States
5.4 x 4.3 x 3.2 CM (cabinet)
price: $750


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.
SOLD Rhodochrosite -classic locale
stock #SOLD 13.1-242
Emma Mine, Butte, Butte District, Silver Bow County
Montana, United States
2.6 x 2.4 x 1.9 CM (thumbnail)
price: $0


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.
Duftite on Quartz
stock #17.1-795
Black Pine Mine, Flint Creek Valley, John Long Mts., Granit Co.
Montana, United States
12.8 x 9.3 x 4.2 CM (cabinet)
price: $650


A large plate of Quartz crystals up to 2 CM in size are thickly coated with Duftite in olive-green spheres. An old specimen from the Black Pine Mine that is famed for the great Veszelyite finds there. I have not seen another specimen quite like this from any USA locality it looks like a dark botryoidal Tsumeb Duftite on a Montana Quartz. An unidentified coating of brighter yellow is also present and adds some contrast. it is a very significant and sizable Duftite specimen with a lot of character. In good condition overall there are a few tiny chips on some Quartz but most are perfect and undamaged. The Black Pine mine has a complex and wonderful mineral assemblage including many uncommon associates. This piece is significant for the locale is the best USA Duftite I know of. Ex Chris Amo collection.
Enargite -Classic locale
stock #16.1-601
Leonard Mine, 3800 foot level, Butte
Montana, United States
5.2 x 4.8 x 3.9 CM (small cabinet/ large miniature)
price: $380
Spring 2019

A cluster of unusually bright, lustrous and sharp Enargite crystals with a few small Pyrite and Quartz on the edges. In excellent undamaged condition with Enargites free standing up to 1.7 CM. A choice, classic Leonard Mine (Butte, Montana) specimen from the golden age of mining there. The flashy luster on this black Copper Sulphide is quite esthetic (and even attractive for a black mineral)compared with the more usual sooty black specimens.
Pyrite -octahedral on Quartz Classic USA
stock #18.1-506
Emma Mine, Butte, Butte District, Silver Bow County
Montana, United States
5.4 x 4.3 x 2.7 CM (small cabinet/ large miniature)
price: $200
Dec 2018

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.
Covellite -iridescent crystals ex. Conklin
stock #16.1-507
Leonard Mine, 3800 foot level, Butte
Montana, United States
3.6 x 2.5 x 2.5 (miniature)
price: $280
new june 17

A fine, sharp, well crystallized Butte Covellite collected in Butte before 1966 by Paul Heissfeld. Comes with Heissfeld and Larry Conklin labels. Larry notes: An excellent mass of large crystals and no matrix. Classic form and habit, very good blue and gold iridescence amid the dark crystals. Covellite crystals of any size are rare and best known from just two localities, both long closed.
7 specimens listed
Page   1 |