A super Pseudomorph with an outstanding, long provenance from the early years at Tsumeb. Radiating flower like structure that seems to be fully replaced by Malachite. Close to 100 percent Malachite, there is just a sliver of matrix on the base. An unusual form, as most Malachite Pseudos are clearly replacements of Azurite but this seems to be a replacement of a native copper structure. The bottom or underside has been sawn to make a flat spot so this sits perfectly on display. From the famed Carl Bosch collection (1874-1940) with his handwritten label and "code" to the Smithsonian institution and Charles M Noll, this has belonged in several major collections. The Bosch label code is described in the Mineralogical record, and if I can read this writing correctly it was obtained on July 17,1913 for 300 marks, a costly piece at that time. This is also a quite early specimen as the mine would not yet have reached level 6 at that date (it would eventually reach level 46) and this piece would have been found well before that date. There are relatively few specimens preserved from the earliest discoveries at the worlds greatest mineral locality. This is one.
7.3 x 4.8 x 2.2 CM (cabinet)
A very fine deep emerald green Dioptase from Tsumeb with the intense color that can not be done justice on a computer. Wet-look luster and sharp transparent crystals densly cover the matrix plate. No damage and far better in person. Tsumeb Dioptase is known as a bit different from that found any place else. When at its best it is the most intense color in the world. This has that color. Ex. Charles M. Noll collection, from the heyday of the mine, mid seventies vintage.
Azurite - rosette nodule
4.6 x 4.4 x 3.9 CM (miniature)
From the brief attempt to reopen the great Tsumeb mine for specimen extraction this is a fine example of a rosette nodule. From the 5.1 sublevel of the west 4 stope this specimen shows unusually large crystal blades and classic radiating form that is much more distinct than were most that were found. In fine condition, complete and quite unlike most of the Azurite from Tsumeb.
A fine thumbnail of Anglesite showing the entire crystal form perched on a sliver of matrix, from Tsumeb.
This habit of Anglesite with the zoned dark inclusions is distinctive. In fine condition, no damage can be found even at 20X magnification. One end of the crystal has both Pyrite and Galena in small crystals and masses on the exterior faces, the other end is uncoated except for some micro Cerussites (white) not seen without good magnification. There are dark inclusions of what is most likely Galena seen at several places but mostly near the terminations as dark zones. The matrix here is mostly a druse of small Anglesites that are black, lustrous and thickly included with Sulfides. A choice Tsumeb piece and a nice Anglesite.
An extraordinary, esthetic Tsumeb Azurite with crystals in compound clusters much like flattened rosettes and curved prisms. Presents well from all sides and in perfect, undamaged condition. Similar in some ways to a few specimens we have seen with this habit from the famed Easter pocket, this piece is not attributed to that find but reportedly is from an older discovery. Far better in person, the blue is an intense deep hue that is almost impossible to render on a computer screen.
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.
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.
3.1 x 2.7 x 2.4 CM (small miniature/ large thumbnail (toenail))
A choice early Azurite from Tsumeb formerly in the Johannson collection obtained in trade with Harvard before 1933. Thick rectangular blades in a mass on minimal matrix. Excellent luster and a somewhat unusual form, this has some chipping and some rehealed areas that can hidden by angle of display. The edge modifications and faces on this Azurite are very unusual for Tsumeb and in fact for any locality.