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Mineral Specimens with Calcite
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8.3 x 4.8 x 4.7 cm. A CLASSIC, OLD-TIME and aesthetic hedgehog cluster of glassy, light pink calcite scalenohedrons from the famous Pallaflat Mine of England. The pleasing pink color is due to hematite tinting within the crystals and is one of the most desirable English calcite varietals. This two-sided beauty is pristine, exceptional in itself. The longest crystal is 4.0 cm. Ex. William Hiss Collection.
13.9 x 12.4 x 6.9 cm. That white "crystal" atop this large plate of amethyst from Morocco is not what it appears to be. What you are looking at is an eggshell-thin cast of quartz that formed around a calcite crystal, retaining its form perfectly after the calcite inside was etched away by corrosive solutions in the pocket. There is a little peephole that lets you look inside. What a stunning pseudomorph, and perched right up there on a perfect setting! A very unusual specimen, not something that came out in quantity from this locality.
4.8 x 2.4 x 2.0 cm. Morocco has been turning out some really nice specimens of this very desirable calcite varietal over the past couple of years. Here you have sizeable (to 1 cm), distinct crystals of a fine bright pink. There are some missing crystals but these recesses serve to make the remaining crystals stand out more.
10.8 x 8.9 x 4.2 cm. This fascinating specimen formed when gemmy calcite crystals grew in the natural pocket formed by a buried fossil clamshell. The interior of the shell is now completely covered with these fine, golden crystals. Not many fine collector specimens come from Florida, of course! This is a large and very complete specimen from this find, and therefore exceptional!
10.4 x 9.5 x 7.4 cm. The specimens from this UNIQUE find in China dried up quickly awhile back. I say unique because there really is nothing else that looks quite like these: large calcite crystals whose edges are decorated with bright, golden clusters made up of tiny balls of pyrite crystals! This is a large one, with a rich covering of the pretty pyrite.
15.1 x 8.7 x 4.2 cm. This is a really interesting Illinois calcite specimen, created when calcite formed casts around crystals of fluorite. What evidently happened then is that this cast became separated from the host fluorite, allowing crystals to form all over it - front, back and edges. The result is this large, sculptural specimen spiky calcite crystals all over it.
5.4 x 4.4 x 2.9 cm. A pretty specimen of lustrous dioptase crystals on a matrix of euhedral calcites, with a later generation of micro-calcites that formed on part of the specimen, giving it the mossy accenting color. So you have a mix of the stark white calcite, glassy green dioptase and the more velvety areas with the micro-calcites. Tsumeb dioptases are ALWAYS highly desirable!
4.9 x 3.4 x 3.4 cm. These gem emeralds from Columbia are WONDERFULLY gemmy and saturated with the best green color! There are actually four crystals here - two very small, and two quite sizeable. The largest measures just over 1 cm across the termination in the "long" direction. All of the terminations are perfect and undamaged! You can see the contacts on the bottom part of the crystals, where they grew against matrix, but the tops are perfect and un-contacted. They stand out beautifully against the stark white calcite (which is a real crystal, not just lump rock!) Such associations are uncommon in a good price range, and the color here is eye-popping.
6.0 x 3.4 x 2.1 cm. A 4.8 cm twinned and doubly terminated calcite crystal aesthetically set on sphalerite from the famous and now-closed Elmwood Mine. This glassy, classic light amber beauty is nearly pristine and are now much in demand. The very faintest of termination edge wear is noted, but is certainly not a detraction, as you can see.
7.0 x 6.7 x 4.2 cm. A SUPERB, AESTHETIC and PRISTINE cluster of frosted, off-white calcite scalenohedrons on matrix from Irai, Brazil. This is a gorgeous, complete all-around specimen with many viewable angles. The crystals reach 3.0 cm. The crystal richness and jackstraw arrangement make for an exceptional piece.
10.6 x 6.4 x 3.6 cm. Lustrous crystals of a light tan color, dramatically isolated on matrix - dominated by two at the top of the specimen. The larger of these measures 5 cm. Looks beautiful with the more slender one leaning out from it at a gentle angle. From 1991 mining at the Sweetwater. Ex. George Feist Collection.
6.1 x 5.5 x 2.3 cm. This fine Kansas galena specimen looks like a piece of modern art, does it not? There is no matrix here, just these gorgeous sharp crystals stacked together and in some cases barely touching one another. Very elegant for this style, I think! From the old Tri-State District, 1930s-1960s.
2.7 x 2.7 x 2.7 cm. A RARE and VERY SHOWY combination specimen from Tsumeb of gemmy and lustrous, emerald-green dioptase crystals tucked into a two-sided vug between calcite crystals coated with lustrous, black heterogenite. Heterogenite is a rare cobalt hydroxide and the coated step-faced and blocky calcite crystals are a very nice feature to this excellent Tsumeb rarity. Ex. Rob Smith Collection.
13.2 x 12.5 x 5.8 cm. A beautiful light pink color "pagoda"-style crystal group of compressed, light pink Calcite rhombohedra stacked into this very attractive display specimen. These are great contemporary Chinese classics showing superb form with great displayability. For the overall quality, this is a very good cabinet sized display piece of these very attractive Calcites. Ex. Brian Kosnar Collection.
9.2 x 7.1 x 4.4 cm. This piece is from a new find at Chenzhou featuring, sharp, lustrous, gemmy, pseudo-pyritohedral, very light straw colored crystals on Quartz matrix. The specimen is in great shape overall, and displays very well. I have not seen many of these around, and this is easily of the better pieces I have encountered. Largest crystal measures 1.8 cm across. Ex. Brian Kosnar Collection.
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Rob Lavinsky, rob@irocks.com
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share specimen![Calcite, Hematite from Pallaflat Mine, Bigrigg, West Cumberland Iron Field, North and Western Region (Cumberland), Cumbria, England, UK [db_pics/mdpics/MD-144986a.jpg]](db_pics/mdpics/MD-144986a.jpg)
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![Dioptase, Calcite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-146048b.jpg]](db_pics/mdpics/MD-146048b.jpg)
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