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.
Ruby (Corundum) on Marble
Mogok, Pyin-oo-Lwin District
5.7 x 4.2 x 2.9 CM (small cabinet/ large miniature)
A sharp, doubly terminated pink to red Ruby sits well exposed on contrasting Calcite/ Marble. The Crystal is 2.3 CM long, and shows bright luster and sharp striations. Vividly fluorescent as well, the crystal is complete despite a few cracks, and has a good translucence.
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.
Henderson Mine, Chibougamou
3 x 2.3 x 1.8 CM (small miniature/ large thumbnail (toenail))
An esthetic cluster of shining Cubanite crystals all showing classic twinningset on just a sliver of matrix. The Henderson Mine at Chibougamou has been closed for many years, it was the only source of these fine, sizable Cubanite crystals. The largest crystal in this cluster is is 2 CM across, and sits well on top of the specimen. Close exam shows some minor bruising, contacts and natural cracks, so this is not for perfectionists, but as Cubanite is a very delicate mineral this is in relatively fine condition. and far better than average. Some areas that look like damage in the photos are on inspection fully intact and crystalized with a rough texture. The metallic luster is excellent and has a nice patina. These are a modern classic and somthing of a "holy grail" for most collectors, the starburst twinning habit is especially desirable. An excellent value for the quality.
Small but bright, sharp and gemmy free standing crystals of bright yellow Legrandite. These crystals line a vug with a druse of smaller more pale Legrandites as a background. A small area of Smithsonite in Scalenohedral crystals is also noted on the back of the matrix. This is an older specimen from 1970 vintage finds. Magnification reveals a few broken crystals at the edge but those in the central area are complete and perfect. A very good budget specimen.
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!
Tanzanite (blue Zoisite) gem crystal
Merelani, Umba Valley, Lelatama Mountains, Arusha Region
3 x 1.1 x .6 CM (small miniature/ large thumbnail (toenail))
An especially vibrant, sharp and clean gem crystal in impeccable condition. The intense blue hue on this is far better than the average and the crystal shows well the famed color shift to a strong royal purple as it is rotated. As the gem values for good Tanzanite is so high the cost of a good specimen with top color can be prohibitive. This is an exception, a small miniature with big visual impact for well under 4 figures. Many Tanzanites have been heat treated to enhance color, it is almost impossible to tell. This one has a hint of red color when viewed down the C axis from the termination. That is said to be a good indication that the color is fully natural.
A superb gemmy Microlite crystal with very lustrous faces and good color. These were tested to be Fluornatromicrolite but they are also often labeled as "Microlite group" which is a bit less exact. No matter the name, the quality and large size is exceptional and the addition of glassy clear Topaz on the specimen adds some interest too. It is rare to see a crystal so perfect and at 1.5 CM it ranks as a giant for this usually non esthetic specie. From the Urandu mine finds of 2017, this is as fine as has ever been found in Pakistan and for that matter worldwide.