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Mineral Specimens with Quartz
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7.8 x 6.1 x 5.6 cm. Primary malachite is for some reason quite unusual from Mexico, and this is a very attractive example as well. A vug in massive quartz is covered in a druse of gemmy, sparkling quartz crystals, alternately colored by malachite and perhaps goethite. Sitting majestically at the top of the specimen is a large botryoidal cluster of lustrous, dark green malachite, measuring just over 2 cm across. This specimen was on loaned exhibit in the University of Arizona Museum for over a decade until my purchase of this collection in 2008. Ex. Dr. Miguel Romero Collection.
8.3 x 4.4 x 3.1 cm. Wonderfully formed in the shape of a bow-tie, this glassy and gemmy, color-zoned amethyst specimen has crystals reaching 8 cm across. The longest crystal is doubly terminated and all the crystals exhibit their most intense color at the terminations - an unusual quality in Veracruz crystals and an accent that really makes this stand out. Graceful and exquisite, this is one of the most elegant small cabinet amethysts from this locale that I have seen. This specimen was on loaned exhibit in the University of Arizona Museum for over a decade until my purchase of this collection in 2008. Ex. Dr. Miguel Romero Collection.
10.5 x 6.0 x 4.9 cm. This is an intensely colored, 3-dimensional cluster of converging, lustrous and gemmy, amethyst crystals. They reach to 9 cm in length. All are complete save two minor ones. Unlike the Veracruz amethyst where the color tends towards more lavender hues, the Guerrero amethyst is more intense in the body of the crystal , truly purple; and this is a classic example. An aesthetic group, from old finds here. This specimen was on loaned exhibit in the University of Arizona Museum for over a decade until my purchase of this collection in 2008. Ex. Dr. Miguel Romero Collection.
4.7 x 3.5 x 1.2 cm. An extremely rare and famous specimen, this is "the Romero Amethyst twin" to many collectors. It is a freak of nature in that, for some reason, amethyst has not been found in Japan-law twinning as with its smoky and clear cousins. Nobody knows why. Yet, here is a true twin, precisely measured to confirm the relevant angles and prove the fact (often, apparent twins simply are out of plane and not true twins). It is a pristine, floater specimen considered to be perhaps the finest miniature sized quartz specimen from Mexico by many collectors. Romero obtained this piece in the early 1980s and I hear from other collectors that offers were often made to trade it out of him at very high prices, but were always politely turned down. This specimen from the Dr Miguel Romero collection was on loan exhibition to the University of Arizona Museum for over a decade, until my purchase of this collection in 2008. It was on display in special cases at the museum, and has since been featured in the book "The Miguel Romero Collection of Mexico Minerals" which we sponsored as a special supplement book (published by the Mineralogical Record in December of 2008).
12 x 8.7 x 7 cm. A superb, arborescent cluster of lustrous and sharp pyrargyrite crystals are here perched on crystallized quartz matrix. This is an extraordinarily rare occurrence, and a fine specimen from any locality. But for Taxco, where such large matrix pieces are rare, it is even of more import. This specimen from the Dr Miguel Romero collection was on loan exhibition to the University of Arizona Museum for over a decade, until my purchase of this collection in 2008. It was on display in special cases at the museum, and has since been featured in the book "The Miguel Romero Collection of Mexico Minerals" which we sponsored as a special supplement book (published by the Mineralogical Record in December of 2008).
12 x 10 x 7.8 cm. This specimen from the Dr Miguel Romero collection was on loan exhibition to the University of Arizona Museum for over a decade, until my purchase of this collection in 2008. It was on display in special cases at the museum, and has since been featured in the book "The Miguel Romero Collection of Mexico Minerals" which we sponsored as a special supplement book (published by the Mineralogical Record in December of 2008).
18.0 x 14.8 x 9.3 cm. A striking, very sculptural, 3-dimensional, large cabinet fluorite specimen from a locality that has not produced specimens in any quantity, compared to other Chinese fluorite localities. The very pretty, translucent, sea-green, modified fluorite octahedrons each have thousands of tiny micro-stepped faces that give the crystals an interesting sugary/frosted look. The matrix is small, milky quartz crystals on massive quartz.
8.4 x 7.0 x 6.7 cm. The quality of Chinese rhodochrosite from the Wudong Mine keeps getting better and this is an excellent example. This impressive piece features a huge, 7.6 cm wide, translucent, cherry-red rhodochrosite rhomb perched on starkly contrasting snow-white quartz with smaller rhodochrosites. The bottom of the piece is very richly covered with sparkly, brassy pyrite crystals. A large, very highly representative Wudong rhodochrosite.
10.2 x 6.6 x 5.6 cm. A highly unusual, strangely shaped, combination cabinet specimen from the famous iron mines of Egremont, England. Pink, crested baryte blades are sheathed in a dramatic box-work of specular hematite, which in turn, is coated with a quartz druse, giving the hematite the sparkly look. I have never seen an English baryte with this type of hematite/quartz association. Strange, but very interesting. This probable old-timer, from the very much less well-known Haile Moor Mine is from the J.G. Dixon and John Ydren Collections.
7.8 x 4.4 x 3.5 cm. A striking and excellent cluster of well-defined, highly lustrous, vivid pink, flat prismatic rhodonite blades from recent finds at the San Martin Mine of Peru. The rhodonites are richly dusted with quartz micro-needles, which add a nice sparkle to this beautiful piece. From the 1998 find.
9.8 x 7.0 x 6.6 cm. An uncommonly glassy, transparent and striking quartz crystal from the Vandall King and Richard Hauck Collections. This complete-all-around, doubly terminated crystal has incredibly pronounced, recessed, skeletal features and amazing, parallel, clay inclusions that give the crystal an-other-worldly look. The back is heavily etched, but has no damage. This riveting, very uncommon, older specimen is from Avery County, North Carolina, which is well-known for quartz and hyalite opal specimens. The Hauck collection was one of the largest quartz collections in the US.
4.3 x 3.4 x 2.5 cm (largest). An interesting and unusual looking pair of amethyst crystals from Brandberg and the Charlie Key Collection. Both crystals have vivid and variable shades of purple saturation, which adds to their attractiveness. The larger crystal is a sharp, gemmy, flattened scepter with interesting skeletal features in the termination faces and rare and unusual quartz rosettes aesthetically attached. The slender amethyst spike in the other piece is actually a doubly terminated scepter. The scepter is partially buried in smaller crystals. Both pieces are pristine. A very interesting pair of amethyst scepters.
14.0 x 11.0 x 10.0 cm. An impressive cabinet combination specimen from the Borieva Mine at Madan. One end of this dramatic piece is highlighted by iridescent, golden, magenta and peacock-blue chalcopyrite crystals to 2.5 cm. Sharp cuboctahedral galena crystals to 2.8 cm, with fine gunmetal lustre are aesthetically nested in sprays of quartz crystals to over 3.0 cm. Classic Madan material.
20.0 x 14.7 x 5.8 cm. Our Chinese sources have furnished us with another striking example of the mineral bounty of their country. This is a new find of carved and polished jasper picture stone from a less well-known area. This striking, two-sided, large cabinet piece has two outdoor, country scenes: one side is a meadow with shrubs and trees below a grayish sky; while the other side is a wooded hillside. They look like paintings by the famed Impressionist artists of the 19th century. Art in stone. The size measurements include the custom-made wooden base.
16.5 x 15.9 x 9.8 cm. A spectacular, very uncommon, large cabinet pseudomorph specimen from the Raura District of Peru. Sparkly, gray, drusy quartz has pseudomorphed huge, pseudo-hexagonal aragonite crystals. The upright crystal is complete-all-around and pristine, including the doubly terminated sidecar crystal. The giant 17.5 cm crystal is also totally pristine. This sculptural and aesthetic specimen probably dates to the 1970s. I have seen a few smaller ones, but certainly not anything of this size and quality.
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Rob Lavinsky, rob@irocks.com
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share specimen![Malachite, Quartz from Concepción del Oro, Mun. de Concepción del Oro, Zacatecas, Mexico [db_pics/mdpics/MD-266074a.jpg]](db_pics/mdpics/MD-266074a.jpg)
![Quartz (Var: Amethyst) from Piedra Parada (Piedras Parado), Mun. de Tatatila, Veracruz, Mexico [db_pics/mdpics/MD-266082a.jpg]](db_pics/mdpics/MD-266082a.jpg)
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![Quartz (Var: Amethyst) from Piedra Parada (Piedras Parado), Mun. de Tatatila, Veracruz, Mexico [db_pics/mdpics/MD-266098a.jpg]](db_pics/mdpics/MD-266098a.jpg)
![Pyrargyrite, Quartz from Taxco de Alarcón (Taxco; Tasco), Mun. de Taxco, Guerrero, Mexico [db_pics/mdpics/MD-266117a.jpg]](db_pics/mdpics/MD-266117a.jpg)
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![Tennantite, Quartz from Concepción del Oro, Mun. de Concepción del Oro, Zacatecas, Mexico [db_pics/mdpics/MD-266118b.jpg]](db_pics/mdpics/MD-266118b.jpg)
![Fluorite, Quartz from Ganzhou Prefecture, Jiangxi Province, China [db_pics/mdpics/MD-266147a.jpg]](db_pics/mdpics/MD-266147a.jpg)
![Baryte, Hematite, Quartz from Haile Moor Mine, Egremont, West Cumberland Iron Field, North and Western Region (Cumberland), Cumbria, England, UK [db_pics/mdpics/MD-266149a.jpg]](db_pics/mdpics/MD-266149a.jpg)
![Rhodonite, Quartz from San MartÃn Mine, Chiurucu (Chiuruco), Huallanca, Bolognesi Province, Ancash Department, Peru [db_pics/mdpics/MD-266150a.jpg]](db_pics/mdpics/MD-266150a.jpg)
![Quartz from Avery Co., North Carolina, USA [db_pics/mdpics/MD-266169a.jpg]](db_pics/mdpics/MD-266169a.jpg)
![Quartz (Var: Amethyst), Quartz from Goboboseb Mountains, Brandberg area, Brandberg District, Erongo Region, Namibia [db_pics/mdpics/MD-266271a.jpg]](db_pics/mdpics/MD-266271a.jpg)
![Galena, Chalcopyrite, Quartz from Borieva mine, Madan ore field, Rhodope Mts, Smolyan Oblast, Bulgaria [db_pics/mdpics/MD-266275a.jpg]](db_pics/mdpics/MD-266275a.jpg)
![Quartz (Var: Jasper) from Liuzhou Prefecture, Guangxi Zhuang Autonomous Region, China [db_pics/mdpics/MD-266277a.jpg]](db_pics/mdpics/MD-266277a.jpg)
![Quartz (Var: Jasper) from Liuzhou Prefecture, Guangxi Zhuang Autonomous Region, China [db_pics/mdpics/MD-266277b.jpg]](db_pics/mdpics/MD-266277b.jpg)
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