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Mineral Specimens with Copper
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2 x 1.3 x 1 cm. An excellent, well-developed, single, twinned crystal of Copper. The crystal has a fine luster and deep brownish-copper color. It is very unusual to find any copper crystal with this fine and sharp of a crystal habit, let alone in isolation. Ex. Wendell E. Wilson Collection.
Penny-bright copper showing lustrous faces, wrapped attractively around and rising up from calcite. 5.9 x 4.8 x 3.2 cm
6.0 x 3.2 x 1.6 cm. An exquisite specimen of finely crystallized copper. This piece has 3-dimensional, thick, spinel-twinned crystals and is also aesthetic. It is rare in such quality, from the 1800s and these mines. Ex. Mark Rodgers Collection to Kristalle to Dr. Mark Feinglos Collection.
6 x 5 x 3 cm. A truly stereotypical example of the classic "blister ore" that miners loved even more than the finer crystallized minerals of the day. Why not? It’s really interesting and attractive. However, because they were not valued so highly at the time by more prominent collectors, few have been preserved in good shape. This is excellent for the size because of its lustre, color, 3-dimensionality, and aesthetic quality. Ex. Dr. Edward David Collection.
2.4 x 2.3 x 2.2 cm. Here is a fine thumbnail size specimen of the famous pseudomorphs of Copper after Aragonite from Corocoro. These floater specimens are well known from Bolivia for their great form and color, and this piece has the classic and unique form that has made these pieces some of the most well known and highly sought after pseudomorphs around. Here we have a beautiful little specimen of the highly sought after "disco ball" habit pieces, which only are found in about 5% of the specimens from Corocoro. This specimen is a very fine example of this material, especially because it is so sharp and distinct. There hasn't been any significant amount of these specimens on the market in approximately 25 years, and they are often only found in old collections.
A very difficult-to-obtain specimen of copper, and a FINE one at that. You just do not see Onganja specimens around - and this one is particularly fine in form and crystallization. It sits on a "base" of a calcite rhomb, completely crystallized rising up from this base in delicate branches. If you like coppers, here is a really good one! Old material from the Gary Hansen Collection (reflective of 1970s-80s dealer stock) 3.4 x 2.7 x 1.6 cm
4.4 x 3.4 x 2.6 cm. A fine, old-time, combination specimen from the famous mines at Bisbee. Frosted, colorless calcite scalenohedrons, many doubly terminated, richly and aesthetically cover the 3-dimensional matrix of hackly copper, which includes spinel-twins and uncommon twisted copper wires. Ex. Dennis Mullane Bisbee Collection.
7.4 x 6.2 x 4.3 cm. Beautiful, highly lustrous, vibrant green clusters of primary malachite crystals richly fill the vugs on all sides of the 3-dimensional matrix of solid, hackly copper on this outstanding rarity from the famous mines at Bisbee and the Dennis Mullane Bisbee Collection. Primary malachite is uncommon worldwide and is certainly scarce from Bisbee. Probably old-time material from this historic locale, but no proof.
An excellent and very sculpturally-shaped cluster of elongated tetrahexahedron copper crystals with EXCELLENT cuprite and tenorite patinas from the recent finds at the Old Indiana Mine in Ontonagon County, Michigan. Dramatic, 3-dimensional, and better in person! 7.2 x 5.5 x 3.7 cm
4.7 x 2.7 x 1 cm. A delicate and elegant copper specimen consisting of very fine dendritic crystals. The dendrites range from 1-2 cm, and the crystal growth on each one is very sharp and intiricate. The excellent patina adds nicely to the overall aesthetics of this piece, which is from one of the world’s classic copper localities. Ex. Martin Lewadny Collection.
8.5 x 4.2 x 3.2 cm. A striking and classic copper specimen from the Champion Mine of Michigan’s famed Copper Country. Fabulous, dendtritic groupings of spinel-twinned copper crystals spring upward from a single long "backbone" of arching spinel-twinned copper. The large, 4.5 cm, doubly terminated crystal group at the end is particularly striking. The crystals have a nice patina, which in some places is further accented with a red cuprite coating. This form of copper crystals was classified as Type I branching by Dana in 1886. The historic Champion Mine operated from 1902 to 1967 and this is probably an old-time specimen.
3.5 x 3.5 x 2.8 cm. Here is a fine small miniature size specimen of the famous pseudomorphs of Copper after Aragonite from Corocoro. These floater specimens are well known from Bolivia for their great form and color, and this piece has the classic form that has made these pieces some of the most well known and highly sought after pseudomorphs around. This specimen is a great example of this material, as it is actually a cluster of two intergrown pseudomorphs. There hasn't been any significant amount of these specimens on the market in approximately 25 years, and they are often only found in old collections. For the size, sharpness and quality, this is a superb example of these unique specimens.
7.1 x 6.3 x 1.5 cm. An aesthetic copper specimen from recent finds at the Fengjiashan Mine of China. The sculptural, arborescent copper crystal cluster consists of prominent, flattened, spinel-twinned crystals at the extremities and tetrahexahedrons in the interior. The patina on this fine, two-sided piece varies from a rich coppery tone (probably with some cuprite, too) to a mottled look and many of the crystals have striking iridescence. This artistic piece looks like a sea fan. A finely crystallized copper specimen.
9.5 x 9.2 x 6.0 cm. A fine, old-time and heavy specimen of solid crystallized copper from the famous mines at Bisbee and the Dennis Mullane Collection. This excellent, arborescent piece consists of spinel-twins, tetrahexahedrons and hackly copper crystals. The "thumb" or branch is 4.8 cm long and the spinel-twins reach 4.3 cm. The copper crystals have a nice patina. A larger than normal and fine copper specimen from Bisbee. 757 grams or nearly 1.7 pounds of pure copper.
6.4 x 4.9 x 3.2 cm. Seldom do you see Bisbee combination specimens with this striking, sculptural quality and rarity. The matrix is a folded sheet of solid copper. Pretty green primary malachite microcrystals richly cover all sides of the copper matrix, including the striking, free-standing copper spinel-twins. The large spinel is 2.2 cm. And a fine bonus are the "nests" of tiny calcite crystals, that look like eggs. This is a fabulous, old-time Bisbee combination specimen from the Dennis Mullane Bisbee Collection.
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Rob Lavinsky, rob@irocks.com
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