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Mineral Specimens with Calcite
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5.3 x 5.0 x 3.9 cm. A beautiful and classic, old-time English specimen of a multitude of very glassy and gemmy, hematite-tinted, pink calcite scalenohedrons on a matrix of botryoidal hematite "kidney" ore from the famous iron mines at Frizington. The pink tinting, crystal glassiness and the hedgehog pattern of scalenohedrons are mesmerizing. Material of this quality was collected around 1900 or earlier. A fine English calcite from the Karl Warning Collection. Obtained from Gene Schlepp of Western Minerals in 1991 at the Tucson Show.
6.8 x 6.5 x 2.6 cm. What you see here is solid smithsonite (rare in any form from Arizona, in fact, but particularly as manifested here). In the center, you can see the super-sharp rhombs which were originally calcite, but were entirely replaced by smithsonite, molecule by molecule, retaining the original form of the calcites. The reddish surface color is from iron oxide. Ex. Dave Stoudt, William Hiss and the University of Arizona Mineralogical Museum Collections.
15.8 x 15.8 x 9.3 cm. There are no more of these beautiful Leiping calcites to be had - the mining stopped around 2 years ago. This is a big plate of crystals, up to 1 cm across the typical pyramidal terminations, with the gleaming luster that makes these so pretty.
10 x 8.8 x 6.4 cm. Here are three gemmy, light amber calcite twins, with glassy luster, right next to a rich bed of super-lustrous crystals of sphalerite. The little white crystals are dolomite. Ex. Mullane Collection.
7.4 x 5.4 x 3.0 cm. A fine amethyst from the Valenciana Mine with a much different appearance. Here, the lavender color is suffused through the crystals. The association here is calcite. Ex. Mullane Collection.
11.4 x 8.3 x 4.8 cm. This amethyst specimen is a bit different in that there are both little gemmy crystals and snowy puffballs of calcite decorating the surface of the amethyst. Ex. Mullane Collection.
15.9 x 13.0 x 6.9 cm. A large specimen consisting of wonderfully lustrous crystals of calcite sitting on a perfectly designed thin crust of matrix with a lower "shelf" and a rising backdrop. These crystals get their beautiful rusty-red color from rich inclusions of hematite. Ex. Mullane Collection.
4.0 x 3.2 x 2.7 cm. An excellent Dal’negorsk pseudomorph of gray calcite pseudomorphing a very sharp ilvaite crystal with a classic, chisel termination. The pseudomorph is aesthetically attached to a matrix of needle quartz crystals dusted with chalcopyrite. The quartz crystal impaling the pseudo is striking. Classic Dal’negorsk pseudomorph material from the early to mid-1990s.
6.8 x 4.3 x 4.3 cm. An aesthetic and unique, "pagoda-style", calcite specimen from recent finds at the Daye Mine of China in 2006. A sharp, highly lustrous, hematite-tinted, hexagonal, "poker chip", crowns the 3-sided, stair-stepped scalenohedron (colored umber-red by hematite inclusions). Ex. Helmut Bruckner Collection.
8.6 x 4.5 x 3.7 cm. These calcite stalactites are superb - for a Carter County piece, this is about as good as it gets. It has intense color, dramatic form, and is in excellent condition. Ex. Helmut Bruckner Collection.
5.3 x 4.8 x 4.0 cm. A classic gemmy, complexly twinned calcite from India showing numerous interpenetration angles. As you can see, it is quite complex, and nearly a floater as well (complete all around).
This is a plate of intergrown Calcite crystals that have a nice tan color and excellent luster. The form is really sculptural and interesting, besides which it is a floater - complete all around! . This is quite an attractive piece for any collector, and the superb luster really highlights the beauty. 9.2 x 9.1 x 2.6 cm
Very nice thick growth of botryoidal manganocalcite from one of the most famous mines in the world. You don’t often see such a good consistent pink color in calcites. The whole piece is translucent and the color is just gorgeous. 7.6 x 4.0 x 3.1 cm
5.5 x 4.5 x 3.9 cm. The Tsumeb Mine produced a stunning variety of calcite specimens. This aesthetic and exceptional, mounded piece from the Rob Smith Collection features one of the most desirable varietals: very glassy, colorless, water-clear, flattening rhombs with stair-step faces. The scattering of green copper oxides on the matrix is a superb accent.
9.6 x 7.0 x 4.4 cm. A fine, layered combination specimen from recent finds at the Moscona Mine of Spain. A "snowy", preferential dusting of tiny, sparkly, white baryte blades coat glassy, transparent, nearly colorless calcite rhombs to 2.6 cm. The calcite rhombs rest on highly lustrous, transparent, two-toned fluorite cubes - some fluorites are amber and some are grayish-amber.
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Rob Lavinsky, rob@irocks.com
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