Smithsonite with Cerussite and Calcite
Otavi-Bergland district, Oshikoto,
3.6 x 2.3 x 1.7 (small miniature/ large thumbnail (toenail))
Pre Holiday 2017
This specimen is one of a kind, a unique Tsumeb oddity with great esthetics. An elongated, gemmy crystal of Smithsonite rises from a gossan matrix and hosts a few gem clear smokey Cerussites. The Smithsonite shows signs of being a compound crystal with parallel growth but a single termination. The Cerussites and a tiny part of the Smithsonite (only seen with magnification) are chipped but this is on the "back" not visible on display, the front and side view are pristine undamaged. Tiny Calcites with some odd habits are also scattered on the matrix. The crazy composition of this specimen is typical of why so many collectors love Tsumeb minerals.
A killer thumbnail with several perfect gem clear Cerussites on a contrasting green Conichalcite. A few of the Cerussites have the yellow crust that is usually identified as Mimetite but a few similar pieces turned out to be Hedyphane, this one has not been tested. The arrangement and esthetic construction is first rate. By naked eye this is pristine and undamaged, but one small contact/chip is seen with good magnification. Since Cerussite is so fragile the condition is extraordinary. I would rate this as strong competition quality and certainly better in person.
A choice and attractive Tsumeb specimen. A flower-like cluster of sharp Malachite pseudo after Azurite crystals is nicely perched on mounds of sharp well crystallized green Duftite. These are sizable (for the specie) and they are perched on what looks to be Mimetite and some Cerussite with a few gem clear Calcite crystals, a tuft of Rosasite and a few other micros of related species. This is the kind of elegant and complex mixing of diverse species and crazy chemistry that makes Tsumeb minerals so incredible. In fine condition, displays well and a real treat under the microscope.
A super well formed snowflake style Cerussite twin with excellent detail and luster. A textbook perfect habit in remarkable clean condition damagewise this displays great from several angles. Presents both gemmy transparent areas and zones of "catseye" inclusions. Fine classic material and better in person.
Cerussite -vintage from classic locale
Freidrichssegagen Mine, Frucht, Bad Ems District
3.2 x 2.6 x 2.3 CM (small miniature/ large thumbnail (toenail))
new june 17
An old, very gemmy Cerussite with several different crystal habits present with label from the mining Acadamy at Freiberg (Bergakademie Freiberg). The Bad Ems area once had many lead mines and was famed for its great Pyromorphites. The Cerussites could also be quite fine as seen here but many old pieces do not have a clear mine atribution. This piece is clearly noted as from the Friedrichsegen mine, which closed in 1913. The condition is excellent.
San Juan de Rayas Mine - Level 407
2.8 x 1.4 x 1.1 (thumbnail)
new june 17
A well formed thumbnail of complex Acanthite crystals. These show modified cube forms and "melted" look hoppered crystals. A nice dark silver patina and good luster give this a nice presence. A classic Mexican specimen.
A large, sharp, very pale green single crystal of Prehnite in blocky form. From the Jeffrey Mine, where some of the worlds best and largest Prehnite crystals were found. No damage and with good luster this is a nice thumbnail that shows the habit well. Prehnite is a rather common mineral but crystals over a half centimeter are very rare and only come from a few finds.
A complete floater, this twinned Cerussite is crystallized all around and is in pristine condition. Dusted with Micro crystals of Posnjakite and perhaps a few other species, which add a nice color contrast. The individual arms are complex, multi-faced, parallel growth crystals which are lustrous and in some areas transparent. Text book habit with the twinning well defined and esthetic.