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Mineral Specimens with Copper
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34.2 x 11.5 x 7.2 cm. This is an extremely large and impressive "snake" of intergrown copper crystals obtained by Gene Sensel from Werner Krauss' collection in 1962. Hauck bought the Sensel collection and kept these for himself. They are probably very old specimens, but there is no way to be sure how old or exactly which mine they came from. They are complete on both sides and all-around; it’s very hefty and impressive in person. For the size, this is an extremely elegant specimen too, with none of the uusual matrixy-ugly-included portions common in so many large coppers. Ex. Richard Hauck Collection.
10.6 x 6.0 x 5.2 cm. This piece is exquisitely and minutely crystallized. It looks "woven," for lack of a better word. Just an extremely beautiful copper of substantially unique style. Ex. Richard Hauck Collection.
10.5 x 5.5 x 2.8 cm. This is an incredibly ornate, intricate crystallized copper that looks like nothing so much as an ancient ceremonial shield. It features sharp (razor sharp) spinel-twinned copper crystals radiating off to either side of a central array of two larger and more robust crystals running lengthwise down the piece. Between each spinel twin "spoke" are hundreds of tiny connector crystals in a herringbone-style pattern, reinforcing the strength and stability of the whole piece as well as making for a mesmerizing look. The piece is 3-dimensional, in that it has a thick midsection lending stability and support. This is a very unusual style for a Michigan copper and quite different than most of what you could obtain from these old mines. Ex. Richard Hauck Collection.
9.2 x 8.9 x 8.1 cm. Like other fissure vein pieces of substance this most likely dates to the 1870s-1890s peak of production and has a wonderful old antique patina to it. This particular piece is a rarity - a thick cluster of intergrown spinel-twinned copper crystals, to 6 cm in length. While common enough from Arizona, such thick twinned clusters are not common at all from Michigan's historic mines. The crystallization is complete-all-around, and the piece is much more impressive in person because the camera blurs on the focus here. Also, the patina on this is a very desirable chocolaty brown. Ex. Richard Hauck and Allen Crunden Collections.
6.2 x 4.2 x 3.7 cm. This is a fantastically complex and intricate copper, most likely from the late 1800s, with 3-dimensionality and aesthetics that are hard to beat. From the Lake Superior Copper District of the Keweenaw Peninsula. Ex. Francis and Patricia Benjamin Collection.
7.0 x 6.9 x 2.3 cm. A very sharp, dramatic, arborescent specimen of elegant copper crystals in herringbone form, reaching up from a well trimmed matrix. An excellent display piece for an unusual habit. If we knew the mine name for sure, it would be much more valuable. However, as with many such specimens, the mine names have been lost with time.
3.1 x 2.1 x 1.9 cm. A small cluster of semi-transparent calcite crystals to 1.8cm, with bright shiny copper included within. The scalenohedral calcite crystals are sharp and well-formed with no significant damage. Michigan calcites with copper came from several mines in the district, but almost all came out almost 100 years ago. Few clusters appear on the market, with most specimens being singles. This specimen comes with a label indicating the piece was purchased from a William Collins on June 3, 1935. Ex. Richard Hauck Collection.
3.9 x 3.3 x 2.1 cm. Although its original external form is still obvious as being aragonite, it is very evident that the aragonite has been totally replaced by copper. This is a neat, unusual specimen. These classic copper pseudomorphs are seldom seen today on the market and to me represent one of the most interesting pseudomorphs of all out there, in that such a common carbonate as aragonite has been replaced by a native element. Ex. Richard Hauck Collection.
5.9 x 4.3 x 2.8 cm. This area of the upper peninsula of Michigan has produced not only the most, but, overall, the finest copper specimens in the world. While not large, this copper specimen does have the quality that one looks for. A stalk of copper crystals give way to two euhedral, lustrous, doubly terminated, patina rich copper crystals, to 2.5 cm across. They have a very unusual form, almost like a flattened pyramid.
4.1 x 2.5 x 2.5 cm. Ernie Schlichter had a well-known Michigan copper country collection, from which this is one of the choice silver miniatures. It is much more elegant than most Michigan silvers you normally see, because of the sharp crystallization and stark isolation of those crystals on contrasting matrix. It shows several habits of silver crystals, you will note, including the rare elongated spinel twin. Ex. Ernie Schlichter Collection.
2.8 x 0.9 x 0.6 cm. Classic for the locale, this is a spectacular, spinel twinned copper with a multi-hued patina. It very much resembles the much larger, modern, spinel twinned crystals from Dzhezkazgan, Kazakhstan.
6.6 x 4.9 x 4.7 cm. Illustrated in ExtraLapis: Calcite issue, page 8, as the stereotypical of a sharp calcite rhombohedron in a discussion of the forms of calcite, this is a truly spectacular example of the classical rhombohedral form of calcite, from Tsumeb. The huge calcite rhomb is colorless, lustrous, transparent, and measures to 4 cm on edge. The matrix of copper has a green patina, and is laced with tiny copper included calcite crystals. This is an elegant calcite matrix piece from the heyday of Tsumeb. It is perfect in form and symmetry and undamaged save for a very minor bruising along one edge of the lower left. This was exchanged by me recently from the well-known calcite collection of Francis and Patricia Benjamin.
6.7 x 1.4 x .8 cm. An excellent well-defined single spinel twin crystal of Copper that is an amazing 6.7 cm long. The modified Copper cubes growing the length of the specimen are attractive and sharp, and the copper has an excellent patina. Spinel twin Coppers this long are few and far between from African locales. This old copper specimen is from the Stan Korowski collection who originally brought out many of the famous Zambian minerals and wrote about them extensively in the Min. Rec. and other journals years ago. Ex. Martin Lewadny Collection.
3.2 x 2.4 x 1.8 cm. An aesthetic and pristine, floater rosette of copper pseudomorphs after bladed azurite from the Copper Rose Mine of New Mexico. One of the most sought after New Mexico pseudomorphs. Nice patina and sharp form make this a superb example of this classic, old-time material. Ex. British Museum of Natural History and comes with three labels.
31.0 x 16.0 x 1.8 cm. A dramatic, large cabinet, native copper specimen from the historic Keweenaw Peninsula of Michigan. This sculptural giant looks like curved vertebrae or else has a vague biomorphic look. The copper is oxidized and has a bit of matrix attached to it. Old-time material from the Richard Hauck Copper Collection.
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Rob Lavinsky, rob@irocks.com
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