Amethyst - radiating cluster
stock #17.1 099
Cerro de Concordia, Piedra Parada
5.1 x 5 x 2 CM (small cabinet/ large miniature)
Late Summer 2021
Flawless, gemmy and highly lustrous, a simple cluster of Veracruz Amethyst formed by doubly terminated crystals. In exceptional condition there are a few small bits of adhering matrix but overall this is just Amethyst. This locality is unique in the world for look and quality of the Amethyst. These represent a great value in the mineral world. The arrangement of these crystals in a star cluster is also a hallmark of the Piedra Parada zone. It is almost impossible to appreciate fully the glass-like nature of this specimen in photos.
One of the most sought after Tsumeb minerals is Cerussite that has inclusions of Chalcotrichite that turn clear crystals red or orange. The most vivid examples tend to be very small crystals and incredibly costly. This is a choice Cerussite that has Chalcotrichite needles, both on the exterior and interior, however the color not super saturated but is a light reddish-orange. The crystals reach over 3 CM which is large for an included Cerussite, and are quite well-defined with obvious twinning. Several faces are rather jagged looking on close exam where is seen geometric stepped crystal patterns some of which have formed around needles of Chalcotrichite. The matrix is a mixture of Dolomite, Malachite, Calcite and there are some unidentified dark acicular crystals at the junction of the Cerussites with the matrix. The Cerussites are transparent and the faces are highly lustrous and glass-like. Looks fine from several angles, the main crystals are in fine condition with perfect tips. The backside has some minor broken areas but it is only on the back and not seen from the front which is in excellent shape. A hard to get Tsumeb rarity that is better looking in person too.
A fine and uncommon example of the As variety of Descloizite known as Dechenite with several vintage labels. The front surface of this specimen is densely covered with sparkling crystals of red orange As-Descloizite. The crystals are quite elongated and most are in fine condition as well. Old labels are included from Julius Bohn (Vienna, dealership begun in 1884), W Mauncher (Munich 1870-1930) and an unattributed Italian. Choice, historic and unlike "normal" Descloizite!
Franckeite has always been an incredibly rare mineral and was only known in micro crystals until the major find in 2004 of what was then called Potosiite. This is now known to be a variety of Franckeite with less tin than usual. This was not a large find but the better specimens were quickly gobbled up by collectors and are almost never available now. This piece was one of those major specimens, it is from a collection we are liquidating for the owner and retains the original Kosnar label. In incredible condition for this delicate mineral with individual crystals that reach over 1 CM, in clusters and free standing masses. This piece also has crystals of the original Franckeite that is not the Potosiite variety so this brings two of the world's rarest Sulfosalts on a single matrix. For the species, this is also an esthetic piece, with very three dimensional form and a good metallic luster.
Scheelite on Muscovite
Mt. Xuebaoding, Pingwu Co., Mianyang Pref.
4.3 x 3.4 x 3 CM (miniature)
Late Summer 2021
Outstanding miniature with a sharp and glassy Scheelite crystal nestled in Muscovite blades. The Scheelite is translucent to transparent and has the sought-after orange color. There is no damage or chipping but there is some cracking to note near the base which have been stabilized. This is not distracting or easy to find without some magnification. The price has taken this into account. Good Scheelites with fine color have become costly, larger specimens of this quality are often well into the 5 figures. This piece was collected in 2005 while the small mines on the higher reaches of Mt. Xuebaoding were active. More recent finds from Pingwu are found at lower elevation and mostly are a light yellow to brownish. A pretty modern classic.
Cantera Llamas, Duyos, Caravia
2.9 x 1.8 x 1.8 CM (thumbnail)
Late Summer 2021
A pair of edge modified cubes of transparent Fluorite in an esthetic cluster. The condition is incredible with textbook perfect form, the color a light violet and the one crystal is tabular. An excellent large thumbnail, it is hard to capture the clarity and form in photos, in person it is especially impressive. The faces appear glass-like and smooth at first but on close inspection with good lighting the surfaces are covered with tiny geometric growth structures. A few very tiny Fluorite cubes are perched on this as well, and there is a shard of snow-like Quartz matrix that adds a nice sparkle. Aside from a small cleave on the underside of the lower crystal (not visible on display) this is perfect from all points of view, competitive quality.
Pyrite - altering to Hematite/Goethite
Green Monster Mountain, Prince of Wales Island, Prince of Wales Island
3.5 x 3.1 x 2.6 CM (small miniature/ large thumbnail (toenail))
Late Summer 2021
From the famed Green Monster Mountain (Alaska) a Pyrite crystal partially pseudomorphed by Iron Oxide species. This locale is well-known for fine Epidote but the Pyrite pseudos are seldom seen. The Pyrite on this has good somewhat iridescent luster on some faces. Several faces also have some fissures and and stepped zones. The pyrite form is distinct and the specimen seems to be solid and stable.
A perfect thumbnail of a complete undamaged pseudomorph from the famed Green Monster Mountain (Alaska). This is the sharpest example of this replacement I have seen from this locality, though there are very few pieces to compare out there. This is a 360 degree specimen with textbook form and clean edges. One small spot shows a little remaining Pyrite which is surprisingly very lustrous. This is a classic locality for Epidote though the related minerals are much less well-known. Ex. A. Edwards collection, a fine small thumbnail.