stock #19. AX-886
Mina Ojuela, Mapimi
5.7 x 5 x 3.2 CM (cabinet)
A dense carpet of bright blue-green needle crystals of Aurichalcite on Gossan Matrix. An older Mina Ojuela specimen, this is in impressive condition for such an obviously fragile mineral. This locality has been a source of world class Copper, Lead and Zinc minerals for centuries. Especially amazing under magnification, this small cabinet specimen has a rich three dimensional character and displays well.
From the famed ancient locale of Fontainebleau this is a choice example of the classic "Sand Calcite". Two complete clusters of these sharp stacked crystals are complete on all sides with no damage. These Calcites are distinctive and are immediately recognizable. Looks fine on all sides.
Fluorite on Quartz
Riemvasmaak, Kakamas district
Northern Cape Province,
5.5 x 3.8 x 3.2 CM (cabinet)
A milky Quartz with a subtle phantom is a the matrix for a mass of sharp zoned Fluorite crystals. These Fluorite cubes have a blue to purple edging and white to yellow cores. This locality (Riemvasmaak) has been a well known locality for fine green octahedral Fluorites but this style and habit are far more rare. Esthetic and in very good condition, the Fluorites are about 3 mm in size. An attractive and unusual specimen, the Fluorites cover three of the faces of the Quartz, the remaining 3 faces are empty.
Cliff Mine, Pheonix, Keweenaw County
16.1 x 2 x .5 CM (cabinet)
An antique native copper "finger" or "fan blade" made by skilled hand chiseling long ago. These artifacts were made by miners from the often huge masses of pure Copper encountered in the Upper Penninsula of Michigan. From the John Marshall collection, this is recorded as from the Cliff Mine, such attributions of these artifacts are quite uncommon. Aside from the very hard labor of hammering through solid copper, these fingers required a lot of skill to create such a long straight and clean blade. While not a typical mineral specimen this is a very much a classic Native Copper that has had a major trimming job!
Spessartine on Galena
Broken Hill, Yancowinna County
New South Wales,
5 x 4.3 x 3.4 CM (cabinet)
A killer bright red well formed Spessartine Garnet perched on classic Galena matrix from Broken Hill. The Garnet is nearly 2.5 CM across the long dimension, which is huge for this locale and the color, luster and condition are superb. No damage or repairs, the back of the Garnet has a clean contact but is complete and with no chipping even under 30X magnification. Sits well for display without props, this is far better in person. This almost certainly came from the North mine but the old labels are not specific, so we are listing it as simply "Broken Hil"
A complex small specimen with two main large Bismuthinite crystals that are covered with tiny crystals of Stannite and Marcasite. The specimen also has areas of Chalcopyrite as well as some tiny needle crystals of Bismuthinite that seems to be a later generation. A choice example of the thicker type of Bismuthinite crystals and a nice association of these two Sulfides. From a recent find that was premiered in Munich in October 2019.
A huge somewhat crude but very sharp Helvite series crystal is nestled in a cluster of prase type Quartz. These Helvite crystals are often zoned in this locality and may contain all members of the series (Danalite, Helvite and Genthelvite) in a single prism. This one has clearly also had some secondary alterations, and some parts of the Helvite faces have been encrusted with tiny Quartz crystals. The termination has an extra touch - a purple octahedron of Fluorite perched near the tip adds contrast. No damage, the Helvite is nearly 4 CM tall which is very large from any locale and especially big for Huanggang. An early specimen (prior to 2008) from this now prolific mine. An impressive example of this locale and specie.
A well crystalized cluster of Gypsum I(Selenite) with rich green inclusions and encrustations of the rare mineral Herbertsmithite. This find has produced what are certainly the most esthetic examples of this specie as Herbertsmithite is not usually a "display" grade mineral. Recently Herbersmithite was found to have unique properties of changeable magnetism and with quantum spin properties. This was picked up in some of the popular media and somewhat exaggerated as news, even being called a "new form of matter". There was a brief period where tiny crumbs were being sold for high prices. Despite the inaccurate hype this is a remarkable mineral and on this specimen it is actually attractive.