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Mineral Specimens with Calcite
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5.5 x 4.0 x 3.2 cm. Mineral specimens from the much less well-known Greenside Mine of Cumbria, England are rare and are very rarely available on the market. A sharp, glassy, translucent, pearlescent, trigonal, "poker-chip" calcite crystal sits atop a column of massive calcite on this fine old-timer specimen. The poker-chip is complete-all-around and has only trivial edge-wear on one edge. Almost certainly this fine piece is around 100 years old or older, but no proof. Ex. Mullane Collection and accompanied by an older, faded Burminco label.
6.0 x 5.8 x 4.6 cm. A striking and strange looking specimen from Germany. Cobaltoan calcite is very rare from Bauhaus, Hesse. A shocking, 3.7 cm, globular/botryoidal mass of translucent, vivid pink cobaltoan calcite is well-placed on the matrix. A little "horn" highlights this amazing piece. Very rare on the market. The color is comparable to Congo, Moroccan or Mexican material.
7.7 x 5.3 x 4.3 cm. Rosasite is relatively uncommon from the Mina Ojuela of Mexico and to find an excellent example is rare, indeed. Intensely blue-green, velvety botryoids of rosasite, with entrancing lighter highlights, richly and thickly cover the sturdy gossan matrix on this fine specimen from a new find. A nested vug holds very glassy, flattened, colorless calcite rhombs.
2.7 x 2.7 x 1.5 cm. A classic, old-time, butterfly-twinned calcite crystal from a very uncommon English locale - Eyam in Derbyshire. This lustrous, translucent specimen has classic form. The top edge and one edge are pristine. The other, contacted edge has the specimen number on it. Very fine and highly representative material. Certainly around 100 years old or older. Comes with an expertly handwritten, faded label from an older collection. The collection this came out of was a museum stash dating to prior to World War I.
15.9 x 13.9 x 6.2 cm. A fine cabinet calcite specimen from recent finds at Santa Eulalia, Mexico. Sharp, lustrous, and translucent dogtooth calcite crystals are partially coated with hematite and have striking, clay-stained, internal, hematite phantoms. Crystals reach 5.5 cm on this piece.
4.1 x 3.4 x 2.9 cm. A vug of well crystallized, gray calcite hosts this incredibly gem-clear, transparent, rich green emerald, measuring 1.75 cm in height. In recent years, the Coscuez Mine has produced many fine emerald specimens, like this one. However, to get such an aesthetic piece, without damage (and not a fake) is nearly impossible. This was an older specimen, obtained from a friend's collection. Ex. Alain Martaud Collection.
9.6 x 6.5 x 5.6 cm. Recent mining has produced cobaltoan calcite with a rich magenta hue. This specimen is covered in translucent, lustrous, magenta colored crystals, to .8 cm across. The color contrast with the massive, white calcite matrix underneath is astounding. This specimen is one of the better large pieces I have seen to date because of its 3-dimensionality and its color intensity.
5.2 x 4.7 x 3.1 cm. A very attractive combination piece for emeralds, with beautiful, lustrous, bright crystals to about 1 cm sitting on a cluster of rhombohedral calcites.
7.9 x 7.2 x 3.8 cm. A very rare matrix specimen of Quartz from Herkimer, perched atop calcite crystals. The quartz measures 5 cm across and floats up there, complete-all-around. And it’s undamaged. It is also not repaired, as most matrix specimens are. And most of those are just quartz on gray rock. I grew up in the Midwest and collected here as a kid, and I can assure you that one does not routinely see a Herkimer-type specimen like this.
2.1 x 1.0 x 0.7 cm. A truly outstanding, brilliantly colored single crystal perched on a small bit of crystallized calcite matrix. This is complete-all-around. Excellent quality, and rare now. These were found in the early 1980s.
2.2 x 1.1 x 0.9 cm. A truly outstanding, brilliantly colored single crystal with small crystals of calcite attached. This is complete-all-around. Excellent quality, and rare now. These were found in the early 1980s.
10.4 x 4.9 x 3.3 cm. Incredibly deep maroon, glassy, richly-colored disc-shaped crystals to 1 cm drape the entire upper portion of this specimen. It is very 3-dimensional, more so than the photo can convey, and is simply much more dramatic and deeply colored than others I have seen recently. The crystals are almost gemmy.
5 x 4.2 x 1.8 cm. A shocking pink-purple color marks this unique locality within the Pyrenees. I have seen only a few of them in many years, and this one is of high quality for color saturation and form I would say. Ex. Jean Chervet Collection.
14.0 x 10.6 x 10.0 cm. From the noted collection of Chinese minerals assembled by Steve Smale, this is a superb and very unusual fluorite for the location. No damage and complete-all-around. Seldom do you get crystals so large and gemmy. Also, it has an almost neon, saturated color intensity like you seldom see. Note also the sharp internal phantoms, again rare in a Chinese fluorite of such size. The piece is a floater. It is symmetric on front and sides, and then roughly complete all around the backside where it has many microfaces formed where the fluorite grew against another mineral.
4.0 x 3.8 x 2.8 cm. This glowing green emerald crystal is as thick as a finger and very dramatic. It measures 1.5 cm across and is just over 2.5 cm long complete, and then a bit longer with a slender tapering into the matrix. It has top, glassy lustre and a rich color that is very desirable in an emerald. The termination is wonderful, and has a few intricate bevels on the side by way of accent. The black calcite provides the best possible contrast and visual enhancement of the deep green hue, on emerald specimens, and this matrix is very rare. You would think that white works best as background but, in fact, the black calcite somehow visually enhances the green hue of the emerald.
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Rob Lavinsky, rob@irocks.com
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share specimen![Calcite from Greenside Mine, Glenridding, Ullswater, South Eastern Region (Westmorland), Cumbria, England, UK [db_pics/mdpics/MD-261743a.jpg]](db_pics/mdpics/MD-261743a.jpg)
![Calcite (Var: Cobaltoan Calcite) from Bauhaus, Richelsdorf District, North Hesse, Hesse, Germany [db_pics/mdpics/MD-261769a.jpg]](db_pics/mdpics/MD-261769a.jpg)
![Rosasite, Calcite from Ojuela Mine, Mapimí, Mun. de Mapimí, Durango, Mexico [db_pics/mdpics/MD-261782a.jpg]](db_pics/mdpics/MD-261782a.jpg)
![Calcite from Eyam, Derbyshire, England, UK [db_pics/mdpics/MD-261783a.jpg]](db_pics/mdpics/MD-261783a.jpg)
![Calcite from Eyam, Derbyshire, England, UK [db_pics/mdpics/MD-261783b.jpg]](db_pics/mdpics/MD-261783b.jpg)
![Calcite, Hematite from Santa Eulalia District, Mun. de Aquiles Serdán, Chihuahua, Mexico [db_pics/mdpics/MD-261788a.jpg]](db_pics/mdpics/MD-261788a.jpg)
![Beryl (Var: Emerald), Calcite from Coscuez Mine (Cosquez Mine), Muzo, Vasquez-Yacopí Mining District, Boyacá Department, Colombia [db_pics/mdpics/MD-262091a.jpg]](db_pics/mdpics/MD-262091a.jpg)
![Beryl (Var: Emerald), Calcite from Coscuez Mine (Cosquez Mine), Muzo, Vasquez-Yacopí Mining District, Boyacá Department, Colombia [db_pics/mdpics/MD-262091b.jpg]](db_pics/mdpics/MD-262091b.jpg)
![Calcite (Var: Cobaltoan Calcite) from Bou Azzer, Bou Azzer District, Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco [db_pics/mdpics/MD-262094a.jpg]](db_pics/mdpics/MD-262094a.jpg)
![Beryl (Var: Emerald), Calcite from La Pita Mine, La Pita, Maripi, Vasquez-Yacopí Mining District, Boyacá Department, Colombia [db_pics/mdpics/MD-262105a.jpg]](db_pics/mdpics/MD-262105a.jpg)
![Quartz (Var: Herkimer Diamond), Calcite from Treasure Mountain Diamond mine, Little Falls, Herkimer Co., New York, USA [db_pics/mdpics/MD-262123a.jpg]](db_pics/mdpics/MD-262123a.jpg)
![Ettringite, Calcite from N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-262212a.jpg]](db_pics/mdpics/MD-262212a.jpg)
![Ettringite, Calcite from N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-262213a.jpg]](db_pics/mdpics/MD-262213a.jpg)
![Calcite (Var: Cobaltoan Calcite) from Bou Azzer, Bou Azzer District, Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco [db_pics/mdpics/MD-262216a.jpg]](db_pics/mdpics/MD-262216a.jpg)
![Calcite (Var: Cobaltoan Calcite) from Bou Azzer, Bou Azzer District, Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco [db_pics/mdpics/MD-262216b.jpg]](db_pics/mdpics/MD-262216b.jpg)
![Calcite (Var: Cobaltoan Calcite) from Haute-Garonne, Midi-Pyrénées, France [db_pics/mdpics/MD-262225a.jpg]](db_pics/mdpics/MD-262225a.jpg)
![Fluorite, Calcite from Taiping Mine, Xianghualing Sn-polymetallic ore field, Linwu Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-262226a.jpg]](db_pics/mdpics/MD-262226a.jpg)
![Beryl (Var: Emerald), Calcite from Muzo Mine, Muzo, Vasquez-Yacopí Mining District, Boyacá Department, Colombia [db_pics/mdpics/MD-262233a.jpg]](db_pics/mdpics/MD-262233a.jpg)