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Mineral Specimens with Calcite
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An EXCELLENT and SHOWY three-side specimen on sulfide matrix from Tsumeb. Dendritic, green mottramite covers the upper portion of the front of lustrous, transparent, flattened, colorless, calcite rhombs. The right side highlights the calcite rhombs, while the back of the specimen is totally covered with dendritic, arborescent mottramite. A very fine two-in-one Tsumeb piece! 9.4 x 5.5 x 4.2 cm
A SUPERB, AESTHETIC and PRISTINE CABINET cluster of doubly terminated, twinned, lustrous and translucent, golden-amber calcite scalenohedrons on a bit of matrix from the famous Picher Field, Tri-State District, Oklahoma. This very high quality old-timer is easily over 50 years old and the lack of damage is amazing. 12.8 x 12.6 x 6.3 cm
This fascinating specimen formed when gemmy calcite crystals grew in the natural pocket formed by a buried fossil clamshell. Here you have large, gemmy crystals on a part of the original shell. There are a couple of cleaved crystals in back but nothing that really detracts. Not many fine collector specimens come from Florida, of course! 6.5 x 5.6 x 3.7cm
Large, translucent green, sharp octahedrons of fluorite (to 4 cm!), with dove-gray poker-chip calcites on them, on an earlier generation contrasting purple-gray fluorite. 11.6 x 10.0 x 5.2cm
10.1 x 7.1 x 5.5 cm. These specimens have confused collectors since they first came out in the early 1990s as calcite after something embedded in concretions, then glendonite after ikaite, then as calcite after ikaite; and now classified as calcite variety thinolite, which is a pseudomorph after an unknown mineral. This is a strange, biomorphic-looking pseudomorph from Russia. These big, sharp orange-brown pseudomorphed crystals measure up to 4 cm in length. Unlike most of them, which are somewhat radial, this features a large oriented crystal, as if a rocket had just impaled the concretion around the crystals.
This Photo was Mindat.org Photo of the Day - 31st Dec 2006
VERY uncommon on the market, a fine Korean calcite, with thin, hexagonal crystals in a complex intergrowth. There is edge wear hear and there, but it doesn''t detract much. This is an old specimen, very hard to obtain now! 10.6 x 7.9 x 4.1cm
A staggered crystal, sharp and well-terminated, of clear selenite (gypsum) jutting up from a bed of quartz crystals, from Mexico. Dramatic! 10.2 x 8.3 x 6.8cm
Here is something that is getting VERY hard to find on the market, with the closing of the mine: a SUPERB gemmy calcite twin from the Elmwood. What is more, it is perched on a perfect natural "base" of sphalerite and calcite! The crystal is contacted on back where it grew against matrix, but is complete all around. And while the great majority of these crystals have tip damage, there is only virtually microscopic wear in one tiny place on one of the tips - you cannot really see it with the naked eye. So it is in FABULOUS condition. Great golden color and super glassy luster! 7.6 x 6.3 x 3.5cm
An elegant "tower" of poker-chip calcites, with silky luster, piled up on what may have been a stalactite judging from its form. 14.1 x 7.1 x 6.1cm
A large "Herkimer-style" quartz crystal, sharp, lustrous and gemmy, measuring 5 cm, with a smaller crystal nearby, on a matrix that also has sulfides anddolomite, and a cluster of euhedral calcite crystals. Came with a label that shows it to have been purchased at the Rochester Mineralogical Symposium Auction in April of 2000. such a large and interesting matrix piece is really unusual! 24.6 x 11.3 x 7.0cm
Can you possibly imagine a more aesthetic and choice silver from kongsberg of ANY size, let alone a competetion quality thumbnail?! this piece is ridiculously good - it has crystal of large size, classic wires, matrix. AND pedigree.... 2.7 x 1.1 x 1 cm
Incredibly gemmy ruby crystal, perched on matrix! This redefines what you might expect in a gem ruby specimen, particularly on matrix. Seldom are they GEMMY as opposed to "gemmy"... 2.1 x 1.5 x 1.2 cm
Ex Bill Larson collection. Attached on one side by marble matrix, this is a dramatic, doubly-terminated, translucent, deepest pigeon’s blood red, ruby crystal. It has natural wet lustre...its har dto photo both the lustre and color so you have two different shots to emphasize each, if you can combine them more or less in your head. The crystal is 1.3 cm in length. It is well balanced on the matrix. The ruby crystal with its color and highlights represents the very finest quality that Mogok has ever produced, and this was stashed in Bill Larson's collection because of that. BETTER IN PERSON and when backlit, its amazing....probably better off displayed horizontally with the doubly-terminated crystal atop, but either way is good... 1.5 x 1.3 x 1.3 cm
Without question, this vivid red, gemmy, octahedron of spinel on white calcite, is a world class competition thumbnail. Most Mogok spinels are simply loose singles, off matrix. This one, carefully excavated from a miniature at Bill Larson's lab by Irv, is unrepaired and remains on matrix due to the careful prep work. You almost never see this quality of crystal , aside from the additional aesthetics of it being on matrix! The well formed , complete crystal measures .8 cm across. It is truly a thing of beauty. 1.5 x 1.1 x 1 cm
An amazingly glowing and gemmy , 2-inch-long, TWINNED, calcite crystal, like cut glass and even throwing off spectral colors, perched on a matrix of quartz. I have never seen an example of this style of twin so nicely perched on matrix!!! They are always loose singles! The calcite is doubly-terminated, and perfect. The crystal also shows beautiful striations on its faces. Its just incredible...i couldn't believe it... 6 x 4.2 x 3.5 cm
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Rob Lavinsky, rob@irocks.com
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share specimen![Calcite, Mottramite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-49322a.jpg]](db_pics/mdpics/MD-49322a.jpg)
![Calcite from Picher Field, Tri-State District, Ottawa Co., Oklahoma, USA [db_pics/mdpics/MD-49329a.jpg]](db_pics/mdpics/MD-49329a.jpg)
![Calcite from Rucks Pit, Fort Drum, Okeechobee Co., Florida, USA [db_pics/mdpics/MD-49339a.jpg]](db_pics/mdpics/MD-49339a.jpg)
![Fluorite, Calcite from Xianghualing Mine (Hsianghualing Mine), Xianghualing Sn-polymetallic ore field, Linwu Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-49341a.jpg]](db_pics/mdpics/MD-49341a.jpg)
![Calcite (Var: Glendonite) from Olenitsa River, White Sea Coast, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia [db_pics/mdpics/MD-49346a.jpg]](db_pics/mdpics/MD-49346a.jpg)
![Calcite from Korea [db_pics/mdpics/MD-49347a.jpg]](db_pics/mdpics/MD-49347a.jpg)
![Gypsum (Var: Selenite), Quartz, Calcite from Guanajuato, Mexico [db_pics/mdpics/MD-49351a.jpg]](db_pics/mdpics/MD-49351a.jpg)
![Calcite from Elmwood mine, Carthage, Central Tennessee Ba-F-Pb-Zn District, Smith Co., Tennessee, USA [db_pics/mdpics/MD-49362a.jpg]](db_pics/mdpics/MD-49362a.jpg)
![Calcite (Var: Manganoan Calcite) from Dal'negorsk (Dalnegorsk; Tetyukhe; Tjetjuche; Tetjuche), Primorskiy Kray, Far-Eastern Region, Russia [db_pics/mdpics/MD-49365a.jpg]](db_pics/mdpics/MD-49365a.jpg)
![Quartz, Calcite, Dolomite from Benchmark Quarry, St Johnsville, Montgomery Co., New York, USA [db_pics/mdpics/MD-49499a.jpg]](db_pics/mdpics/MD-49499a.jpg)
![Silver, Calcite from Kongsberg, Buskerud, Norway [db_pics/mdpics/MD-49514a.jpg]](db_pics/mdpics/MD-49514a.jpg)
![Corundum (Var: Ruby), Calcite from Mogok, Sagaing District, Mandalay Division, Burma (Myanmar) [db_pics/mdpics/MD-49529a.jpg]](db_pics/mdpics/MD-49529a.jpg)
![Corundum (Var: Ruby), Calcite from Mogok, Sagaing District, Mandalay Division, Burma (Myanmar) [db_pics/mdpics/MD-49530a.jpg]](db_pics/mdpics/MD-49530a.jpg)
![Spinel, Calcite from Mogok, Sagaing District, Mandalay Division, Burma (Myanmar) [db_pics/mdpics/MD-49543a.jpg]](db_pics/mdpics/MD-49543a.jpg)
![Calcite, Quartz from Dal'negorsk (Dalnegorsk; Tetyukhe; Tjetjuche; Tetjuche), Primorskiy Kray, Far-Eastern Region, Russia [db_pics/mdpics/MD-49564a.jpg]](db_pics/mdpics/MD-49564a.jpg)