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Mineral Specimens with Calcite
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7.6 x 5.8 x 4.8 cm. A classic and aesthetic combination specimen from the famous Mid-Continent Mine of the Tri-State District. A 6.2 cm, lustrous and translucent, frosted, golden-amber calcite scalenohedron is jauntily attached to silicified limestone matrix covered with sphalerite and a couple of sharp galena cubes. Pristine, old material from the George Feist Collection, #2824.
6.2 x 4.3 x 3.3 cm. Lustrous, metallic-gray stibnite blades to 2.2 cm are richly and aesthetically invested in vuggy calcite crystal matrix on this excellent and showy specimen from the famous Manhattan District of Nevada. Classic, older and choice material from this famous locality from the Charles Hansen Collection.
8.6 x 6.4 x 2.6 cm. A rarity from Utah - a glistening stalactite of calcite that curved back on itself 180 degrees, then added yet another curly flourish at the tip! Around the base some euhedral crystals have formed, and at the final curve, other crystals in the form of flattened rhombohedra.
10.9 x 6.9 x 4.9 cm. A rare Tsumeb association piece out of the Tsumeb collection of Rob Smith! Here you have these sparkling little bright green crystals of dioptase, sprinkled over a bed of lead-rich (plumboan) calcites. VERY rare to see these two together, indicating a really unusual sequence of solutions that flowed through the pocket in which this piece formed. Of course, anything rare from Tsumeb gets a lot of attention these days.
11.2 x 7.4 x 5.4 cm. You can forgive this large calcite crystal for not having its back end (it backed up against the pocket wall and so cleaved off when the specimen was removed), because the display side is so terrific. It is a gemmy, golden, razor-sharp crystal that measures 9 cm. Right beneath its termination is a complete little gem of a crystal, as well as a very rare (for the Elmwood) colorless calcite! The Elmwood is of course closed, and specimens are scarce now.
6.6 x 4.7 x 4.6 cm. The camera could not pick it up well because it is very subtle, but this cluster of calcite crystals has a pretty, light pastel green color thrown off by these little inclusions of malachite peppered through the inside of the crystals. From the classic Zacatecas locality, known for its azurites (so it is not surprising to see the malachite association here). From the collection of noted California collector Charles Hansen.
5.9 x 5.0 x 4.1 cm. These bizarre Santa Eulalia calcites are distinguished by multi-generational growth where the first crystals were coated by dark iron oxide, and then a second generation of growth occurred with pale calcite. The result is that the specimens look as though you have one crystal emerging out of another!
7.2 x 5.1 x 3.9 cm. A perfect, 4.5-cm, doubly-terminated crystal of calcite, translucent and with pretty light yellow-amber color, set beautifully on a plate of very pale pink, lustrous dolomite crystals. Gorgeous Indiana specimen!
6.9 x 4.7 x 3.6 cm. A SUPERB and AESTHETIC cluster of lustrous, blocky, stark-white (presumably lead-rich) calcite rhombs on a bit of matrix from the world famous and now-closed Tsumeb Mine. This is simply an outstanding, damage-free group of this rare Tsumeb calcite varietal. The large milky white rhombs are wonderfully enhanced by the transparent, gemmy, outer layer of calcite. The rhombs reach 3.2 cm on the long axis. Many displayable views with this gorgeous piece. CHOICE material from the Rob Smith Collection, a noted Tsumeb specialist. Really different than your usual "white" calcite in lustre and ghostly color.
10.5 x 6.7 x 3.3 cm. A SUPERB and AESTHETIC Olinghouse gold CABINET specimen. This showy piece is RICHLY covered with a large and thick U-shaped nest filled with tiny, scintillating gold wires. The gold is etched out of the cream-colored calcite that fills the vugs in the porphyritic host rock. This excellent gold displays beautifully from several views. Ex. Scott Kleine Collection. This would be considered unusually large and rich for the material.
6.4 x 4.3 x 2.4 cm. A RARE, CLASSIC and HISTORIC calcite twin from Frizington, England. These pristine, translucent prismatic crystals have low rhombohedral terminations and are richly included with hematite flakes. This VERY FINE, OLD-TIME specimen comes with two old labels, one from A.E. Foote, a world-class dealer of the late 1800s. The label dates from 1880-1890.
6.8 x 5.9 x 4.6 cm. An elegant combo piece collected by Bill Hatch when he was collecting specimens at the Camp Bird Mine in the late 70s. It features poker-chip calcites to 2.3 cm (though fatter than what would usually be called poker chip crystals) on a matrix of small fluorite cubes and microcrystalline quartz.
4.9 x 2.8 x 1.4 cm. This pretty mini came out of the collection of Illinois collector Ross Lillie. The accompanying label says it came from "advance mining in 1-83 from the northwest edge main ore body." What makes it really cool is this gemmy, tabular golden BARYTE, which beautifully complements the zoned purple fluorites decorated with little calcites.
10.9 x 9.0 x 5.2 cm. Even for a locality that turned out calcite specimens in all sorts of pretty forms, this is just a gorgeous and outstanding specimen. What you have is a large plate of intergrown rhombs with GLASSY luster -- included by little bright green balls of duftite that give the calcites the most unique and elegant coloring!
14.2 x 8.4 x 5.4 cm. This big, rich Hardin County specimen has stuff going on ALL OVER it! On one side, it has these big, dark purple crystals (to 2.9 cm) - so dark in fact that this was called the Black Spar Mine and these were sometimes known as "black fluorites" - though under good light you can see that the crystals have golden centers and purple rinds, not unusual for many of the mines in this complex. On the other side of the specimen are gemmy, deep amber crystals of calcite to 2.5 cm. The plate of fluorite apparently came loose in the pocket, allowing the calcites to grow on the "back" side. Ex. Tom Weisner Collection.
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Rob Lavinsky, rob@irocks.com
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share specimen![Calcite, Sphalerite, Galena from Mid-Continent Mine, Treece, Picher Field, Tri-State District, Cherokee Co., Kansas, USA [db_pics/mdpics/MD-160564a.jpg]](db_pics/mdpics/MD-160564a.jpg)
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