The Quartz of Devils dens on Mt Tabor was recently (May-June 2019) described in a fine article in Rocks and Minerals. Not well known outside the Northeastern USA, these Quartz can take many habits and are often gem clear, alpine style. This doubly terminated example is very unusual with a Gwindel like twist or rotation, a series of almost aligned terminations and a wide Faden line or string through the center. There has been some discussion if these can be called Gwindels and they do seem to meet the basic definition. In excellent condition, very clear and sharp.
Quartz -"Mt Tabor type"
Devils Den, Mount Tabor, Rutland County
3.2 x 2.2 x .6 CM (small miniature/ large thumbnail (toenail))
Gem clear, doubly terminated Quartz from Devils Den that has a slight faden line, and several terminations in a line that share the same tabular prism faces. Some of this sort have been called "Mt Tabor Twins" though these are likely not a unique twin law but are quite distinctive and very unusual. The June 2019 Rocks and Minerals article describes the locality well and these alpine style USA Quartz are not often available on the market.
Quartz- faden, USA locality
Devils Den, Mount Tabor, Rutland County
3.8 x 3 x 1.1 CM (miniature)
The faden Quartz from the long known locality of Devils Den, Mt Tabor, Vermont is rarely seen. This site was recently described in the June, 2019 issue of Rocks and Minerals, and illustrates several unusual habits of Alpine style Quartz not often seen in the USA. This tabular transparent Quartz crystal shows a very distinct faden string as well as offset growth structures and recrystallized breaks. Some chipping exists at one end but the rest is undamaged. A nice gemmy transparent Faden from the USA not often available.
Small but very impressive thumbnail of intense green Garnets sitting on a druze of tiny Diopside crystals. The Diopside is slightly greenish in color and is fluorescent a bright yellow while the Grossular (in 450 NM light) is a brilliant red. Even without this very rare response for a garnet, the specimen is super attractive, the Garnets are gem clear, lustrous, sharp and undamaged. From the great Jeffrey mine, this is a tiny treasure.
An unusual old specimen from Cave in Rock, southern Illinois. Etched Yellow Fluorite with a hint of purple zoning is the matrix for a treelike spray of slender spikey Calcite crystals that are coated with secondary aragonite. Some of the Calcites have stair-stepped epitaxial growths along the prisms. Ex Larry Conklin with his label, This looks very much like some Minerva #1 mine specimens but Conklins laberl only lists Cave in Rock. A delicate, sculptural piece that is also somewhat fluorescent.
The Auglaize Quarry of Ohio is a famed locality in the Finley Arch zone. It is famed for small pockets of Fluorites that can be very sharp and iridescent. This is a nice example of the this locale which is no longer open for collecting. The Fluorites are very lustrous, those that are in the protection of the vug are in fine, undamaged condition. All have the classic "root beer" brown color and show multi color iridescence. As is usually the case these are also brightly fluorescent.
Beryl V. Aquamarine
Shigar, Skardu District, Baltistan
2.9 x 2.4 x 2 CM (thumbnail)
A clean thumbnail of gem clear Aquamarine on an Albite matrix. The Beryl is flattened along one axis and has the classic flat termination. In perfect condition, super transparent, the crystal faces are mostly flat with minimal striation. Overall a choice small gem from the great Shigar pegmatite zone.
Sassi, Gilgit district
3.9 x 2.3 x 1.9 CM (small miniature/ large thumbnail (toenail))
A shard of feldspar matrix hosts a glassy green Herderite crystal in fine condition. Intensely fluorescent, the crystal shows sharp edge modifications and striated faces. From a find in 2005, the crystal here is 2.3 CM in diameter and transparent to translucent. Choice with no visible damage.