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Mineral Specimens with Calcite
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A diverging group of splendent silver–grey stibnite crystals to 4 cm in length is topped by matte black 2-cm-tall crystals of calcite. The calcite crystals are the stacked “poker chip” habit, one atop another. There is some minor damage to the crystal tips, but this is all on the back side. I am told that there are actually a number of old stibnite workings in the area. 7.7 x 6.2 x 4.2 cm
Sprouting from a matrix of 1.5 cm transparent quartz crystals is a single spear of manganocalcite. Highly lustrous and well formed, this obviously pink crystal is also doubly terminated. This is as superb a Romanian mangcalc as I have ever seen. In person, you will see the sugary lustrous effect on the surface is even more impressive 6.2 x 5.3 x 2.5 cm
This is an exceptionally rich specimen just covered with bright, lustrous intergrown spheres of orange stellerite on matrix. The largest sphere measures a whopping 2.5 cm across. This locality has produced among the world’s best stellerite specimens and certainly the prettiest. This piece just sparkles and glows in person and is the best I have seen from here in awhile - they came out in the 90s and have been scarce, since then. 10.5 x 5.9 x 3.2 cm
Against a contrasting druzy quartz matrix, this snowy-white flower of calcite stands out dramatically. The calcite is in pristine condition, is lustrous and is about an inch across. 3.1 x 2.7 x 1.8 cm
Herringbone-style silver from Batopilas is one of the classic examples of crystallized silver in collections. They form from intergrown, sharply elongated spinel twins, connected together. When these silver specimen were plentiful in the late 1970’s, this would still have been a quality piece with unique aesthetics. Today, they are much harder to find and large specimens in particular are uncommon on the market though little cheapies still trickle in from time to time. The specimen is capped off by two 8 cm vertical crystals - that is 3 inches of crysatllized, spinel-twinned silver! 9.6 x 2.6 x 0.5 cm
This is a GORGEOUS and unusually gemmy/lustrous Penn Calcite! It is also big and showy as heck! It features a large, equant, gemmy, lustrous, golden-colored calcite aesthetically arranged on a matrix of smaller calcite crystals. This is an extremely aesthetic matrix specimen because of this form, and the way the main crystal is basically set on a natural pedestal. 10.4 x 11.5 x 6.7 cm
This is a most unique copper-in-calcite specimen. It is a 7 cm rhomb of copper included calcite, well terminated and colored bright pink by the rich inclusions. RHombohedral crystals are rare for the region, and large pseudocubic ones even more so. The crystal is complete on the display faces, though contacted naturally on the upper face. It is hard to tell how much of the backside is contact or cleaved, but there is some roughness in the back regardless (luckily, it doesn't show from front views). In addition, there are five calcite crystal scalenohedra to 1.5 cm, along with native copper, girdling the base . Because they are of more normal habit, and less included than the earlier generation of rhombohedral calcite, they provide a really nice accent to highlight the big crystal and emphasize its weirdness. Lastly, the large, pseudo cubic calcite also appears to be doubly terminated so it is complete on all sides but the back face. 6.8 x 4.1 x 3.1 cm
This unusual combination specimen features clusters of 1-cm crystals of white calcite and colorless quartz contrasting with several splendent, black, ilvaite crystals to about 1 inch. All of this sits on a matrix of massive hedenbergite (sawed flat on the bottom to stand). All of the upright, major ilvaite crystals are fully and magnificently terminated, with the only damage confined to the periphery and thus to the less significant sideways-pointing crystals at the base. Ilvaites of this quality came out richly in the late 80s and the 90s but have since completely evaporated from teh market. Now a Russian classic! 6.5 x 4.6 x 2.7 cm
When these hematites were first discovered at the Wessels mine some twenty or so years ago, they immediately became classics. Their large size and association with red garnet made them highly collectible. This particular specimen, originally in the Ed David collection (number on bottom), is a complex crystal of hematite, with mirror bright metallic luster . Associated are minor drusy red garnets and an equant 1.5 cm calcite crystal. At the base of the specimen ,it has been contacted where it grew vertically out from the pocket wall leaving ALL OTHER FACES perfectly and 100% terminated all around! These are amazing hematites, and the find is today considered one of the major non-rhodochrosite finds for the manganese district. 6.8 x 4.5 x 1.3 cm
This is a superb miniature, competition quality! Extremely lustrous, these opaque white crystals represent the plumbian or lead rich variety of aragonite. They are perched nicely on matrix and the main crystal measures 3.5 cm in length. This variety of aragonite reaches its zenith only at Tsumeb. Moreover, the tarno is in association with calcite, and good rhombohedral crystals at that, a novel association to me. 3.5 x 3.4 x 3.1 cm
A jewel-like, flat, pyramidal calcite crystal growing in a shallow depression in the matrix. These unique Leiping crystals are very uncommon - not many were found. There is a very slight bruise to the lower-left tip as shown in leftmost photo, but as you can see it does not detract much. 5.4 x 3.6 x 2.6 cm
A pretty combo specimen from the now-closed Elmwood. Elmwood specimens have virtually dried up from the market as people hoard them following the closing of the mine – they once were plentiful. This specimen features a SUPERB, lustrous and flashy compound crystal of sphalerite, 4 cm across, with a calcite twin at its side. The twin has a clean cleave at one tip that does not detract from the overall beauty of the specimen. 5.9 x 3.8 x 3.1 cm
A huge, dramatic Eastern European combo specimen, consisting of a ridge of matrix completely covered on all sides with sparkly quartz crystals, crowned by a creamy 9-cm calcite crystal! Mined in Bulgaria in 2003. Extra shipping applies due to size and weight of specimen. 24 x 17 x 11 cm
This is an incredible striated scalenohedron included with a mass of bright copper that grades and thickens into a matrix of copper upon which the crystal rests. Rarely do you find such a combination where the calcite is this clear, or the copper visible in such detail inside, AND where the calcite is pristine and complete all around. This is an absolute killer, and one of the gems of the collection. It is much much better in person, even! 4.2 x 2.7 x 2.4 cm
A glittering, attractive combination specimen featuring a gemmy, clear fluorite crystal perched on a pedestal of galena crystals, and itself draped gently by a glistening coating of sparkling white calcite. This is a striking combo piece from a localitythat, while not quite defunct, now longer produces this assemblage. 7.6 x 4.6 x 3.6 cm
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Rob Lavinsky, rob@irocks.com
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