Rhodochrosite- gem clear Rhomb
Black Rock Mine, Black Rock District, Kalahari Manganese Field
Northern Cape Province,
1.4 x .6 x .3 CM (thumbnail)
Small yet very vivid red and super transparent, a colorful gem crystal. , Sharp and perfectly terminated (these almost always have tiny tip cleaves) a very cute Rhodochrosite from the Kalahari. From the Black Rock mine, this is an older collection piece as these were found decades ago, before the big discoveries at NChwanning. Perfect clarity and a choice thumbnail.
From one of the oldest Mine sites in Europe (close to 900 years plus) this is an exceptional vintage specimen. Well formed Cerussites with elongated pseudohexagonal habit are perched across a crystalized Galena face. The Cerussites are a sooty butterscotch yellow-orange color and are mostly in clusters yet are distinct and well separated. Largest reach 2.5 CM Old labels include one from Muralt (Vienna). In remarkable condition for this very delicate specie, there are only some minor bruises on the outer edges. The Galena has a complexly crystalized surface and the Cerussite is quite strongly Fluorescent.
Quartz with Hematite
Chubb Lake, St. Lawrence County
2.2 x 2.1 x 2.1 CM (thumbnail)
A superb thumbnail- doubly terminated Quartz from Chubb Lake that looks remarkably like a fine English (Cumberland area) Quartz. This has inclusions of sharp Hematite crystals and a few on the exterior of a few faces as well. The crystal is quite transparent but densely included with the Hematites so it seems murky inside. In flawless condition, this has very sharp edges and almost non-existanct prism faces (they are under 1 mm in size). This locality has been closed for decades and dates back to the 1850 vintage. Good pieces of this quality are quite rare, certainly less common that their British counterparts.
A Mimetite from older (1962-64) finds at Mina Ojuela that looks very different from most later materials. The Mimetites are unusually sharp and lustrous, many prisms with hoppered terminations. The crystals are brilliant yellow on one side of the specimen and a dull brown on the other side. Mixed in are several small Calcite rhombs which are transparent too. Most of the crystals are perfect and undamaged but there also spots with damage that keeps this far less pricey. Although not very easily seen without magnification they are there. These older Mexican Mimetites are unlike the later and larger finds that are very well known (San Pedro Coralitos etc), these are not the usual rounded form but are more glassy and quite prismatic.
Sharp transparent Magnesite crystals are a contrasting matrix for a sharp tabular silver-black Hematite crystal. A fine association that is very esthetic and a choice specimen from this important Brazilian locality. This sort of gem clear Magnesites from here may be the best in the world for the specie. The mirror bright Hematite added this cluster brings it up to a high level of esthetics. Far more striking in person this is displayable from several angles and is in fine condition too.
An exceptionally rich, very pure mass of crystalline Proustite that has well preserved color and is fully translucent. With strong backlighting this glows like a chunk of dark red glass (we have not backlit the photos here so it gives a realistic view of the mineral in a normal display). There are numerous complex crystal faces, etched surfaces and edges on this piece but also to note some chipping too. Overall in fine condition for such a very old, vintage specimen. It was suggested that this could be considered facet rough gem stock though that is not what we do. The total weight is over 68 Grams which is certainly a lot of red Silver. With magnification some sharp complete terminated Stephanite crystals are seen. These are small but very fine with an elongated habit that make a nice association. This is from the type locale and especially choice for the large size, condition and quality overall.
Tanzanite Multi Color zoned crystal
Merelani, Umba Valley, Lelatama Mountains, Arusha Region
3.1 x 2.2 x.9 (small miniature/ large thumbnail (toenail))
A sharp gemmy Tanzanite crystal with a strong color change and dramatic zoning. Top grade glassy luster and a lot prettier in person, this shows color changes from yellow to green in the top part, and blue, purple and red in the lower part that is hard to appreciate in photos. The overall condition is fine, there are some small contact rough spots on the backside that are not easy to see and are completely invisible from the display side. The front of the specimen is clean, sharp and undamaged. Far better in person and a great value for such a clean example!
Unusually sharp and transparent crystals of Prehnite in an esthetic cluster. The crystals are in fine undamaged condition and this specimen has a lot of display impact. The Jeffrey mine is famed for its Garnets and Vesuvianite but the Prehnites found here were world class and of incredible variety. This is an excellent example showing the elongated blocky form with a delicate light green hue. Even though Prehnite is not a rare mineral and is found worldwide, good sharp crystals are rare and these from the Jeffrey are unique. Not found for some years, these are modern classics and no others from elsewhere have this look and habit.