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Mineral Specimens with Andradite
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4.1 x 3.8 x 2.9 cm. This is clearly one of the great Italian Alpine classics. Andradite variety demantoid garnets from Val Malenco (the Malenco Valley) are some of the most prized Alpine garnet specimens in the world. This very showy specimen features a "ball" of matrix covered with sharp, gemmy, lustrous, rich green color dodecahedra which measure up to 6 mm. The very sculptural, shoe-looking, matrix, in this case, is fibrous asbestos. These specimens are very difficult to obtain now.
3.3 x 3.2 x 1.3 cm. An excellent and showy specimen covered with unusual, iridescent, lustrous and gemmy, olive-green andradite crystals to 9 mm on granite matrix from Stanley Butte, Arizona. Seldom available in this variety from this locale. Ex. Jaime Bird Collection.
This extraordinarily rich specimen features lustrous, olive-colored crystals of this rare varietal garnet richly scattered about on clinochlore surface. Crystals reach 8 mm which is large for the variety and locality. It is a superb, unusually 3-dimensional specimen. Isolated crystals fo this quality are rare on a specimen of such size, too. The color is a darker shade of olive green than some specimens mined perhaps 6 years ago by the Seibels, which had a more yellow hue to them in general. This is the classic old type and was collected by and in the collection of California dealer JP Cand, a friend of mine who tragically was lost to a freak accident while collecting earlier this year. Before his death, he had sold this specimen to San Diego collector Irv Brown for his California suite (which I purchased this fall). 10 x 7.3 x 4 cm
5.2 x 3.4 x 2.7 cm. A pair of large (1.1 cm) Demantoid crystals nestled nicely in a pocket of matrix. One is horizontal, and the second more tabular crystal stands prominently next to the other. Both have nice luster and a beautiful medium green color. The broadly-stepped faces of the upright tabular crystal are rather unique, and quite attractive. Ex. Charlie Key Collection.
4 x 3.4 x 1.9 cm. A fine cluster of rich yellow Ettringite crystals intergrown with very fine Andradites and massive Hausmannite. The luster, color, and sharp habit of the Ettringites is excellent, and the largest crystal is 1.5 x 1 cm. Ex. Charlie Key Collection.
3.5 x 2.3 x 1.4 cm. An elegant stacked cluster of highly lustrous, super sharp, black melanite garnets from the mid-1990s finds in Mali. The crowning crystal is 1.8 cm and is pristine, complete-all-around, though it has some attached feldspar. The small, tan feldspar crystals are a nice, contrasting accent. Melanite is the black, titanium-rich variety of andradite garnet. Ex. Bill Larson Collection.
8.0 x 6.8 x 5.9 cm. A striking, mounded cluster of large, gemmy and lustrous andradite garnets from the Sinerechenskoe skarn occurrence near Dal’negorsk, Russia. The crystals are beautifully striated and the color varies from a rich brown, to yellowish-brown to reddish-brown. The largest crystal is 2.8 cm, which is large for the locale. Ex. Bill Larson Collection.
3.9 x 2.0 x 1.8 cm. An aesthetic magnetite miniature from the Jaime Bird Collection and near the Dallas Gem Mine. A 1.2 x 1.2 cm, lustrous, textbook sharp magnetite octahedron is set on a sliver of serpentine matrix, which is richly sprinkled with sparkly green andradite microcrystals. The magnetite is complete-all-around and is pristine. According to Jaime Bird’s label, this piece was a gift from well-known dealer Mike New.
Sharp, lustrous, finely-formed garnets of a pretty olive green color cover the face of this really attractive specimen from Dalnegorsk. WOW! I have never seen but one other good andradite from here; and that a one-off specimen that Herb Obodda said he picked up on a trip to Russia. To my mind, this is a very interesting piece, as it is such a rich garnet from a locality which produces not much in the way of this species despite all the tonnes being mined over there. I have not seen this material on the mainstream market with the numerous traveling Russian dealers. 5 x 4 x 1.2 cm
11.5 x 9.3 x 5.6 cm. These some of the better Demantoids outside of Europe/Russia in the world in my mind. This hand-sized specimen hosts dozens of small, sharp, highly lustrous, gemmy, bright green modified dodecahedral crystals of Andradite (var "Demantoid") on schist matrix. PLEASE NOTE that these crystals show a color change from a "mint green" color to a very rich "lime green" hue in different lighting. Under halogen lights, the crystals appear more pastel, but under mercury bulbs, the color is very intense.
This specimen is just so beautiful and uncommon - sparkly maroon crystals of andradite on euhedral crystals of hematite. Even if you collect N''Chwaning stuff, I doubt you have one of these. 3.2 x 3 x 2.8 cm
Large, finely-formed garnets of a rich reddish-brown, with excellent luster, on a bit of matrix. The largest crystal is 1.5 cm across. 4.5 x 3.5 x 2.8 cm
13.0 x 8.7 x 3.4 cm. This hand-sized specimen hosts dozens of small, sharp, highly lustrous, gemmy, bright green modified dodecahedral crystals of Andradite (var. "Demantoid") on schist matrix. Please note that these crystals show a color change from a "mint green" color to a very rich "lime green" hue in different lighting. Under halogen lights, the crystals appear more pastel, but under mercury bulbs, the color is very intense.
4.3 x 3.8 x 2.9 cm. A superb cluster of splendent, flat-topped, bullet-shaped hematite crystals from the Wessels Mine and the Charlie Key Collection. The multiple prism faces are sharp and some are beautifully striated. This is a complete-all-around and pristine cluster, which is nicely accented by preferential coatings of various thickness of micro andradite garnet crystals and two clusters of colorless, bladed baryte on the back of the piece. This is classic and outstanding Wessels hematite.
10.2 x 6.1 x 3.5 cm. Sparkly, gemmy and highly lustrous, dark cherry-red andradite garnets to 5 mm richly line two vugs in sculptural, massive manganite ore on this fine cabinet specimen from the Wessels Mine of South Africa.
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Rob Lavinsky, rob@irocks.com
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share specimen![Andradite (Var: Demantoid) from Franscia Mine, Campo Franscia, Lanterna Valley, Malenco Valley, Sondrio Province, Lombardy, Italy [db_pics/mdpics/MD-223863a.jpg]](db_pics/mdpics/MD-223863a.jpg)
![Andradite from Stanley Butte area, Stanley District, Santa Teresa Mts, Graham Co., Arizona, USA [db_pics/mdpics/MD-227626a.jpg]](db_pics/mdpics/MD-227626a.jpg)
![Andradite (Var: Topazolite) from San Benito Co., California, USA [db_pics/mdpics/MD-22975a.jpg]](db_pics/mdpics/MD-22975a.jpg)
![Andradite (Var: Demantoid) from Tubussis 22 farm (Tubussis; Tubusis; Tubessis), Karibib District, Erongo Region, Namibia [db_pics/mdpics/MD-229892a.jpg]](db_pics/mdpics/MD-229892a.jpg)
![Andradite (Var: Demantoid) from Tubussis 22 farm (Tubussis; Tubusis; Tubessis), Karibib District, Erongo Region, Namibia [db_pics/mdpics/MD-229892b.jpg]](db_pics/mdpics/MD-229892b.jpg)
![Ettringite, Andradite, Hausmannite from Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-229896a.jpg]](db_pics/mdpics/MD-229896a.jpg)
![Andradite (Var: Melanite) from Diakon, Nioro du Sahel Circle, Kayes Region, Mali [db_pics/mdpics/MD-230517a.jpg]](db_pics/mdpics/MD-230517a.jpg)
![Andradite from Sinerechenskoe skarn occurrence (Sinerechenskoye; Sineretschenskoye; Sinerechenskiy Mine; Blue River), Kavalerovo Mining District, Dal'negorsk (Dalnegorsk; Tetyukhe; Tjetjuche; Tet [db_pics/mdpics/MD-232964a.jpg]](db_pics/mdpics/MD-232964a.jpg)
![Magnetite, Andradite from New Idria District, Diablo Range, San Benito Co., California, USA [db_pics/mdpics/MD-236609a.jpg]](db_pics/mdpics/MD-236609a.jpg)
![Magnetite, Andradite from New Idria District, Diablo Range, San Benito Co., California, USA [db_pics/mdpics/MD-236609b.jpg]](db_pics/mdpics/MD-236609b.jpg)
![Andradite from Bor Pit (Boron Pit; Bor Quarry), Dal'negorsk B deposit, Dal'negorsk (Dalnegorsk; Tetyukhe; Tjetjuche; Tetjuche), Primorskiy Kray, Far-Eastern Region, Russia [db_pics/mdpics/MD-23750a.jpg]](db_pics/mdpics/MD-23750a.jpg)
![Andradite (Var: Demantoid) from Ghazni (Gazni) Province, Afghanistan [db_pics/mdpics/MD-237648a.jpg]](db_pics/mdpics/MD-237648a.jpg)
![Andradite (Var: Demantoid) from Ghazni (Gazni) Province, Afghanistan [db_pics/mdpics/MD-237648b.jpg]](db_pics/mdpics/MD-237648b.jpg)
![Andradite, Hematite from N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-23827a.jpg]](db_pics/mdpics/MD-23827a.jpg)
![Andradite from Urals Region, Russia [db_pics/mdpics/MD-23893a.jpg]](db_pics/mdpics/MD-23893a.jpg)
![Andradite (Var: Demantoid) from Ghazni (Gazni) Province, Afghanistan [db_pics/mdpics/MD-239892a.jpg]](db_pics/mdpics/MD-239892a.jpg)
![Andradite (Var: Demantoid) from Ghazni (Gazni) Province, Afghanistan [db_pics/mdpics/MD-239892b.jpg]](db_pics/mdpics/MD-239892b.jpg)
![Hematite, Andradite, Baryte from Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-242675a.jpg]](db_pics/mdpics/MD-242675a.jpg)
![Hematite, Andradite, Baryte from Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-242675b.jpg]](db_pics/mdpics/MD-242675b.jpg)
![Andradite from Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-243310a.jpg]](db_pics/mdpics/MD-243310a.jpg)
![Andradite from Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-243310b.jpg]](db_pics/mdpics/MD-243310b.jpg)