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Mineral Specimens with Calcite
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5.4 x 3.8 x 3.4 cm. A cluster of sharp rhombs of calcite given a pretty grassy-green color by surface inclusions (including tiny balls) of grassy-green duftite. Ex. Rob Smith collection.
5.4 x 3.4 x 2.0 cm. This is a cluster of "nail-head" calcite from China. It is very aesthetic, with one central crystal, and smaller crystals leaning out from its sides. All are nicely transparent.
12.4 x 8.4 x 4.0 cm. A large cluster of honey-colored Missouri calcite crystals, measuring to 3.5 cm, with a sugary luster and smooth, pyramidal tips. Ex. George Feist Collection.
11.4 x 10.4 x 3.5 cm. This is actually a thin ridge of matrix that is covered on both sides with beautiful crystals of sulphur on a bed of calcite. The largest crystal measures 1.5 cm.
MD-177332 - Calcite, Cuprite (Var: Chalcotrichite) - - Archived
Czar Mine (Czar Shaft), Copper Queen Mine (Halero Mine), Queen Hill, Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA
cabinet, 10.8 x 6.0 x 5.5 cm.
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10.8 x 6.0 x 5.5 cm. A fine cabinet specimen from the famous Czar Shaft at Bisbee. Gorgeous and lustrous, bright red, calcite crystals are included with cuprite variety chalcotrichite and copper in numerous, very well-placed vugs on all sides of the robust gossan matrix. The calcite crystals are found in clusters or as beautiful, isolated crystals to 7-8 mm or so. From the 200 ft. level of the Czar Shaft prior to the mine closing in 1944. Ex. Dave & Emily Stoudt Collection.
8.2 x 7.3 x 7.2 cm. This is a beautiful combination of rich native copper, bright, blood-red cuprite and contrasting, white calcite, referred to as campbellite from this mine. 571 grams or 1.4 pounds. Ex. Stoudt Collection.
3.7 x 3.5 x 2.4 cm. An old-time Broken Hill specimen of tufted, grayish-tan atop radial, acicular, brown crystals. The old label has the mineral labeled as kutnohorite. However, according to 1982, Worner and Mitchell "Minerals of Broken Hill", "kutnohorite" (from this locality) has been shown to be microscopic intergrowths of manganoan calcite and calcian rhodochrosite.
3.3 x 2.7 x 1.6 cm. A fine specimen of silver wires with two, lustrous, translucent calcite rhombs from the famous mines at Kongsberg, Norway. The wires have excellent form and patina and the calcite rhombs are beautifully placed on the curled, curved and twisted wires. Ex. Willard "Perky" Perkin and Roland and Kathy Sherman Collections.
7.1 x 5.0 x 2.2 cm. Freestanding, 3-dimensional sprays of fine boltwoodite xls to 8mm make this a superb species specimen, but also overall its quite unusually aesthetic.
8.9 x 5.6 x 3.8 cm. Glittering, sugary, intensely colored dark maroon crystals of Spherocobaltite perched on matrix of light pink calcite.
8.1 x 5.2 x 2.5 cm. Glittering, sugary, intensely colored dark maroon crystals of Spherocobaltite perched on matrix of light pink calcite.
11.5 x 7.6 x 4.5 cm. Rosasite is relatively uncommon from the Mina Ojuela of Mexico and to find an excellent example is rare, indeed. This sculptural, vuggy, cabinet specimen features vugs richly lined with botryoids of vivid blue-green rosasite on the sturdy gossan matrix and superbly and richly accented with glassy, water-clear calcite rhombs. Seldom available in this combination quality. Older material from the Jaime Bird Collection.
10.5 x 6.5 x 6.1 cm. This old-time Oklahoma calcite shows two generations of growth - first a sharp euhedral crystal, then a thick layer of calcite microcrystals that covered the original growth. You can still see the structure of the faces, and the tip of the original crystal sticks out of the top. Ex. George Feist collection.
15.4 x 12.9 x 6.5 cm. A big plate of gemmy golden-yellow crystals of fluorite, razor-sharp, from Spain. The crystals measure to 1.2 cm on edge. They have a superb glassy luster. Adding a pretty contrast and accent to the plate are clusters of milky dolomites with clear calcite cubes.
10.4 x 8.4 x 4.2 cm. There are gleaming crystals of arsenopyrite with beautiful saw-tooth edges. There is a very large mound of the rare sulfide stannite; sharp, gemmy quartz prisms; a covering of sparkly calcite; and even a couple of tiny, perfect scheelite crystals.
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Rob Lavinsky, rob@irocks.com
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