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Mineral Specimens with Calcite
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Very fine, richly included specimen, large thumb or toenail, of this old classic!. 3.2 x 2.5 x 2.5 cm
This is a very unusual and rather pretty specimen of purple fluorite that has coated and actually pseudomorphed/replaced a plate of calcite crystals! The plate has these pseudomorphed crystals on both sides and around the edges, indicating that both sides were exposed in the pocket. It is a very fascinating piece from a unique find! I got this from the collection of Dr. Peter Megaw some years ago. I seldom see them for sale. 9.3 x 7.1 x 3.6cm
Not a mere druse, but BIG, lustrous crystals with flashing pyramidal terminations, richly filling a shallow recess in the matrix. Beautiful pink color and notably gemmy crystals! This specimen is from a recent batch that came out of Morocco with unusually large, gemmy, pretty crystals, and I bought any good ones I saw that were affordable from amongst the dealers they were dispersed to. Good cobaltians like this are NOT easy to get! 8.5 x 8 5 cm
A VERY LARGE and RICH old Weardale piece, with dozens of cubes of gemmy purple fluorite interspersed with platy calcites. Under fluorescent light, the calcites glow pink and of course the fluorites are an intense bright purple (this is after all the locality which lent its fluorites to discovery of the phenomenon of fluorescence!). The fluorite crystals measure to 0.7 cm on edge. 18 x 11.2 x 7.4 cm
Recently, a batch of the highly desirable pink cobaltian variety of calcite with big, gemmy crystals came out of Morocco, and was quickly dispersed amongst dealers. We have been picking up every affordable we can find. This one has fine gemmy crystals with lustrous pyramidal terminations. 4.5 x 4.5 x 3.7cm
A SUPERB, gemmy, and striated, butterfly-twin calcite crystal from England. This very fine and showy, classic specimen has been expertly repaired down the middle. Visually, it really is still pretty darned good but it should be worth half that, now, though it displays well anyways. An exellent, highly representative English calcite. 3.9 x 3.6 x 1.8 cm
A BEAUTIFUL and AESTHETIC, complete all-around and pristine, stalactitic cluster of lustrous, colorless, chisel-headed calcite crystals from the recent find at Wenshan in China. This was a small lot and not many were recovered in this size and quality. 6.2 x 2.0 x 1.6 cm
A gorgeous thumber consisting of two gemmy crystals of calcite, perfectly terminated, in a beautiful "V" shape. A fine representative thumber of this world-classic calcite. 3.4 x 1.4 x 1.1cm
This old Colorado specimen came out of the Kaar Collection, and came with a label that identifies the coating on this calcite crystal as manganese dioxide - but with a question mark after it - so without testing it we cannot be sure that is what it is. At any rate, old Idarado specimens are quite rare on the market, and this is one. 6.9 x 1.5 x 0.9cm
Botryoidal clusters of beautiful blue-green rosasite intergrown with lustrous calcite crystals, in a limonite vug. 4.2 x 4.0 x 3.8cm
This specimen is actually far more spectacular in person than what the pics show. That is because you can only clearly see one smaller crystal speared through the large one from one side to the other, but you cannot clearly see the thin crystal that runs ALL THE WAY THROUGH THE CENTER, pokes out the top and is terminated, right between the two peaks of the termination of the main crystal! This is a FASCINATING crystal specimen from Dalnegorsk! 5.6 x 1.3 x 1.0cm
A SHOWY and MOST UNUSUAL combination specimen from the famous Dzhezkazgan Mine of Kazakhstan. Iridescent, sharp chalcocite crystals to 1.5 cm protrude from silicified limestone matrix below the crowning, very light gray, translucent and preferentially etched, calcite crystals to 4.4 cm. A couple of broken minor chalcocite crystals are certainly not very detracting from this fine piece. It displays well and is very impressive for the stoutness of the xls and how they display dramatically 9.4 x 6.0 x 4.6 cm
A BEAUTIFUL, perfect, brilliant-metallic, 1.9 cm, tetragonal tetrahedrite crystal nested on very light, pastel-pink manganoan calcite on sulfide matrix. This is old-time Peruvian material from the 1970s or early 80s from the stock of dealer Dr. Gary Hansen. The label says Huanuco Dept., but review of the Mineralogical Record Peru Special Issue, indicates that the piece is most likely from the Pachapaqui District in Ancash Dept. 6.9 x 4.5 x 2.7 cm
This beautiful specimen formed when gemmy calcite crystals grew in the natural pocket formed by a buried fossil clamshell. This is an elegant mini, with sharp, gemmy crystals attached to just a merest remainder of the shell hinge in back. 5 x 3 x 2.5 cm
Cute cluster of intergrown crystals! 2.6 x 2.1 x 2.2 cm
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Rob Lavinsky, rob@irocks.com
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share specimen![Copper, Calcite from Quincy Mine, Hancock, Houghton Co., Michigan, USA [db_pics/mdpics/MD-52136a.jpg]](db_pics/mdpics/MD-52136a.jpg)
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![Chalcocite, Calcite from Dzhezkazgan, Zhezqazghan Oblysy (Dzezkazgan Oblast'; Dzhezkazgan Oblast'; Djezkazgan Oblast'; Jezkazgan Oblast'), Kazakhstan [db_pics/mdpics/MD-52626a.jpg]](db_pics/mdpics/MD-52626a.jpg)
![Tetrahedrite, Calcite from Pachapaqui District, Bolognesi Province, Ancash Department, Peru [db_pics/mdpics/MD-52642a.jpg]](db_pics/mdpics/MD-52642a.jpg)
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![Calcite from Hardin Co., Illinois, USA [db_pics/mdpics/MD-52755a.jpg]](db_pics/mdpics/MD-52755a.jpg)