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Mineral Specimens with Copper
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27.0 x 11.0 x 1.5 cm. This impressive large cabinet specimen looks just like a stylized Chinese dragon. The head with elongated snout and comb, sinuous body and tail are comprised of fairly sharp copper crystals with a nice patina. The embedded chlorite-rich matrix fragments are a very nice accent to this superb, two-sided piece. This is classic, old-time, Michigan Copper Country material from the Dennis Mullane Collection. The specimen has been sprayed with krylon as a preservative.
12.8 x 3.8 x 3.8 cm. A fine cabinet copper specimen from the historic mines at Bisbee. This elongated, arborescent specimen of crudely crystallized copper crystals has excellent form. Old Bisbee pieces have become rarer with each passing decade and, despite the tonnage of copper ore mined at the locality, have always been rare even at the source. Ex. Mullane Collection.
6.4 x 3.4 x 2.4 cm. Here we have briliant fiery-orange-red calcite crystals colored so nicely by inclusions of the cuprite varietal chalcotrichite. As a bonus, there are small bits of native copper wires growing about the base of the calcites as well, so you can see a very interesting assemblage in one spot. Old material, rarely seen today. Ex. Harold Urish Collection.
4.4 x 3.9 x 3.2 cm. The 16 to 1 mine is famous for these strangely colored gold specimens, and it turns out that the patina is in part due to a bit of copper present, and mixed in with, the gold. This is an unusual effect in nature, gold being the noble metal and notoriously difficult to get to alloy in nature. Yet, here we have it, and with a very fine color as a result, sort of a more bronzey-gold hue. From an old gold country collection purchased from a family, several years ago. Mass is 66 grams (2 troy ounces plus a bit). Of this, most of that mass, at a guess 85% or more, is gold.
4.4 x 4.1 x 3.3 cm. Here is a wonderful 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. 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, but the most impressive aspect of the specimen is that it measures nearly a full two inches across. Specimens of this size are simply not seen from this locality. Typically, when the crystals reach such a large size, they tend to be rather distorted and rounded, and this piece has such sharp and well defined faces. The piece is also associated with bronze-grey Tenorite and minor Malachite. This specimen is a very fine example of this material. There has not been any significant amount of these specimens on the market in approximately 25 years, and they are often only found in old collections.
6.8 x 2.9 x 2.6 cm. A rare and seldom available specimen from the historic Andacollo Mine of the Coquimbo Region of Chile. The crystals of this beautifully aesthetic, arborescent copper crystal cluster with a "tail" are coated with microscopic bits of bright, rich, yellow gold. Classic, old-time and seldom available material from this famous locale. Ex. Jaime Bird Collection.
8.4 x 7.0 x 1.8 cm. A fine, sculptural specimen of bright, intergrown native copper leaves from the White Pine Mine of Michigan’s historic Copper Country. The copper patina is excellent and the piece is shaped like a mukluk boot. The White Pine was the last copper mine to close in Copper Country.
2.4 x 2.1 x 1.3 (each). Here is a wonderful thumbnail set consisting of a crystal of Aragonite and a pseudomorph of Copper after Aragonite from the famous locality of Corocoro. These floater specimens are well known from Bolivia for their great form and color, and this set is great way to illustrate the "before and after" effect which is rare to find for most pseudomorphs, especially from the same locality. These pieces are some of the most well known and highly sought after pseudomorphs around. This set is a very fine example of this material. 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.
13.8 x 12.4 x 3.5 cm. The Pearl Handle Pit of the Ray Mine is one of the more noted localities in the southwestern United States for crystallized copper. This very fine, two-sided, cabinet plate is composed entirely of sharp tetrahexahedral copper crystals with a rich patina and a bit of embedded, breccia matrix. Scattered on both sides and particularly along the crest of this specimen are beautiful, gemmy, cherry-red cuprite cubes to 4 mm. An excellent, large copper with cuprite specimen from this famous locale. Comes with two, older labels and the former dealer label indicates that the piece was collected in the 1960s.
21.4 x 13.8 x 1.3 cm. A fine, sculptural, large cabinet sheet of native copper from the White Pine Mine of Michigan. This striking piece has aborescent form, a nice patina and remaining shale, as an accent. Native copper was deposited in shale beds of the Nonesuch Shale, explaining the sheet-like form. The White Pine was the last major copper mine to close in the historic Copper Country. Large plates such as this, which formed naturally between the shale beds, are now harder to obtain. Ex. Consie Prince Collection.
6.4 x 6.4 x 0.3 cm. A very strange, natural copper disk from the Itauz Mine of Kazakhstan. I have never seen one like it from this locale. The disk has a coating of red cuprite and also has a nice patina. Unusual material from this well-known locale.
5.8 x 2.8 x 2.4 cm. Curved and curled spinel-twinned copper crystals with a rich patina form an elongate dense nest on this excellent old-time piece from the Tsumeb Mine. Very unusually, there are several knobs of densely packed, small, sharp, tetrahexahedral copper crystals. The crystals are attached to a bit of quartz. Ex. Schmidt and Ydren Collections.
3.7 x 3.0 x 2.3 cm. Here is a fine small miniature size specimen of the 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 pseudohexagonal form that has made these pieces some of the most well known and highly sought after pseudomorphs around. This specimen is a very fine example of this material, as it has exceptionally sharp faces, and is not just a single crystal, but a multi-crystallized group, which is not common for this material. 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.
10.2 x 7.5 x 4.2 cm. Sharp, spinel-twinned copper crystals in branching arborescent form comprise this entire cabinet specimen from the famous Copper Country of Michigan. The copper crystals on this sculptural piece have a beautiful, variable patina. Excellent, old-time material, certainly around 100 years old or older, from this historic district. Ex. Richard Hauck Copper Collection.
33.8 x 17.2 x 0.6 cm. A fine, sculptural, large cabinet sheet of native copper from the White Pine Mine of Michigan. This striking piece looks like a large piece of tree bark with a nice coppery patina. The remaining shale is as an excellent accent. Native copper was deposited in shale beds of the Nonesuch Shale, explaining the sheet-like form. The White Pine was the last major copper mine to close in the historic Copper Country. Ex. Consie Prince dealer stock, obtained over 30 years ago.
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Rob Lavinsky, rob@irocks.com
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