Dalnegorsk, Kavalerovo Mining District
6.4 x 4 x 3.2 CM (cabinet)
Thin undamaged hexagonal Calcites are clustered together without matrix. The crystals are all lightly frosted on the wide faces and are transparent to translucent. The arrangement of the crystals is quite esthetic and displays very well from almost any angle. An older Dal'negorsk specimen ex. Greg Kirby collection. The largest crystal is 4.3 cm wide and just 3mm thick with smooth, beveled side faces.
Red Cloud Mine, Silver District, Trigo Mts, La Paz County
2.8 x 2.6 x 1.3 CM (thumbnail)
A cute thumbnail with a choice, undamaged Wulfenite crystal nicely perched on matrix. Good color, great form and bright glassy luster this comes from the attempt a few years ago to rework some areas of this legendary mine. It is not so well-known that nearly all the Wulfenite from the Red Cloud is twinned, though much of it is hard to see by naked eye. This small crystal (1.1 CM) does show this rather well when examined closely. Nice esthetic example from this classic locale and in remarkably fine condition.
An excellent very old Libethenite from the type locality with well-formed rosette structures. This habit is quite rare from Lubietova (originally Libethen) and these are sizable up to 5 mm which is large for any locale. From the collection of Dr Warren Johannson, his label notes he obtained it in a trade with Amherst College in 1982. The rosettes are in very good condition having been protected in a vug.
Jeffrey Mine, Asbestos
2.4 x 1.3 x 1.2 CM (thumbnail)
Bright, apple-green Vesuvianite crystal that is doubly terminated and has glassy lustrous faces. The crystal is complete all around and undamaged, fully translucent with some spots of transparency. There are a few small sidecar crystals that have some spots that are contacted and recrystallized on those edges, this is not seen without magnification. One termination is a deeper more emerald green color than the other. Overall a choice Vesuvianite from the famed Jeffrey Quarry, the only place on earth that ever produced Vesuvianite of this vivid color.
Doubly terminated, lustrous Apatite crystals set in a pink Calcite matrix. The Apatites are a mix of green to red-brown colors and have the typical slightly rounded edges noted from the Canadian Skarn deposits in this region. The matrix is sawn on the backside which is not visible on display. The smaller crystals have chipping but the largest (6.5 CM) is pristine. These Apatites are slightly transparent and fully translucent.
Textbook perfect, sharp Sphalerite crystal perched on Dolomite with a small bit of Chalcopyrite. The main Sphalerite crystal is complete all around, perfectly undamaged and has the silky luster that is typical from this locale. Through the 1960's, Tri-state specimens were very common even as the mines closed. These are no longer common and are unlike any other Sphalerites from other locales.
Mindingi Mine, Kambove District
Democratic Republic of Congo (Zaire)
7.3 x 5.2 x 4.1 CM (cabinet)
A sizable mass of radiating fibrous crystals of Plancheite on matrix. The Plancheite specimens from the Congo are remarkably rich, considered by many the worlds best come from the Katanga region. This specimen is from an old find at the less well-known Mindingi Mine in Kambove. It is similar to other good specimens from the region and has the silky to chatoyant luster that is distinctive for the specie. Most often Plancheite is seen as an associate mineral, being the matrix for other Copper species, but it can be a very attractive specie in its own right. This looks especially impressive under magnification.
Fine glassy thumbnail with two main crystals that both have green terminations and light pink to violet bodies. The whole piece is translucent and when backlit glows a bright green to yellow with little of the pink showing. This sort of pastel Vesuvianite from Jeffrey is unique in the mineral world. There were several finds of this style there with the elongated blocky habit and pyramidal termination, but those were years ago and there will never be more. Already specimens of average quality are getting expensive and top pieces are nearly priceless. In very good condition, broken only from the base and back edge the terminations are perfect with no damage.