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Mineral Specimens with Copper
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Not often do you find Native Copper from Tsumeb! Speicmens are actually pretty rare for the locale, despite its richness as ore. This is an attractive specimen consisting of many very fine small cubic crystals as well as other habits including leaves and spinel twins. Purchased from the Zweibels in 1976 5.5 x 3.5 x 1.5 cm
Exceptional pseudomorph of Mottramite after dendritic Copper, of such elegance that the pics say it all. There is one weak bit in the middle that has been stabilized with a small dot of glue in the past (i.e. it could be repaired, as well). Now, the piece can be left as is, which I think is best for the sheer drama, or clipped at the stabilization spot in the middle and turned into two phenomenal and unique thumbnails....either way, a killer! Purchased from the Zweibels in 1976 3.1 x 1.2 x .2 cm
VERY RAR E- NATIVE COPPER FORM BOLIVIA! Even aside from the locality value, it is an interesting group of dendritic copper crystals on a massive copper matrix. The crystals appear like pine trees rising from the matrix. A slight coating of oxidation to green gives the specimen a nice aesthetic appeal. Another unique specimen from a very hard to find location. Former Dr. Eugene Sensel collection with old label. 8.9 x 6.9 x 3.0 cm
A great, historical old piece cut by hand with chisel and hammer from a 40-ton piece of native copper! This find was famous. They hit a lode so rich that huge copper nuggets were found in the veins, and one measured some 40 tons. It could not be moved, nor could it be blasted (large coppers simply absorb the shock and compress a bit, but don't blast apart). Thus, the mine employed parties of miners working around the clock on three shifts for months, to carve the nugget up by hand and haul the pieces out. I am told that historians have written the mine actually LOST MONEY by the time all the human labor was factored in. This sliver is the kind of filing they would chip off the large nugget until, bit by bit, they reduced it and smelted the whole thing. The old label indicates the piece was cut in 1860 (pre-Civil War!!) and provides the ultimate documentation you'd want for such a neat artifact. Nice brown patina also confirms the age. Comes with Hugh Ford early 1900's label and also former Edna Doughty collection with label. 8.0 x 2.8 x 1.3 cm
A FINE small mini of copper from the Onganja - crystallized from top to bottom, as you can see! 3.5 x 2.1 x 1.0 cm
Look at the fabulous articulation of the crystals on this old Michigan copper specimen! Their fine form is further emphasized by the presence of contrasting calcite, which serves as a backdrop for the crystals. The specimen shows a beautiful "antique" patina as well. Phoenix mine was active in the late 1800s 5.9 x 3.6 x 3.6 cm
It was sad to see the copper mining at the Itauz Mine in Russia move on from the zone that was producing these amazing crystallized coppers.This one is just so sculptural and aesthetic, in addition to being very large for the Itauz. It has a beautiful branching form and a nice "antique" patina. Plus, a bit of matrix still attached! Crystallized all over -- just a really fine copper specimen! 6.6 x 4.0 x 1.5 cm
A showy and excellent nest of spinel-twinned copper crystals with a nice patina from the famous Onganja Mine of Namibia. Superb crystallization! 2.5 x 2.2 x 1.4 cm
This is a nugget of natural copper deposited by the glacial drifts in the copper country of Michigan. It has been polished on one side to show its penny-bright luster, which contrasts beautifully with the natural "antique" patina. Weighs 3.4 ounces. 5.6 x 3.9 x 1.6 cm
A DRAMATIC and SCULPTURAL Michigan CABINET copper specimen with large sharp crystals and an excellent patina. The piece has a vague, animal-like appearance. Weighs just over 2 pounds! This is much more dramatic in person, and quite hefty and 3-dimensional 13.0 x 9.3 x 4.5 cm
A copper out of the collection of the premier copper-country museum, the A.E. Seaman, with the museum label. This is a big, heavy, dramatic copper specimen, with a penny-bright patina and an attractive branching form. It is actually crudely crystallized as well, with some very evident angular face, and not just an amorphous lump of copper. Weighs over 2 lbs! 13.1 x 13.0 x 3.0 cm
Glaciers crossed Michigan''s upper peninsula severa times thousands of years ago, scouring the landscape and eroding vast quantities of rock, transporting it and redepositing it elsewhere. This is a nugget of natural copper that was picked up and dropped by one of these glaciers! It has been polished to bring out its penny-bright luster, which contrasts nicely with the recessed areas of the natural "antique" patina. This nugget weighs 5 ounces. 5.4 x 3.8 x 2.9 cm
A fine Russian copper specimen, showing gorgeous arborescent form, crystallized from top to bottom, from the Itauz mine in Russia. The mine is now NOT producing any more copper specimens. It is hoped it will produce again in the future, as the strip mine widens, but there is no assurance of this. And, in any case, the last batch of specimens that came out was more "brushy" in appearance and did not include these superb, sculptural specimens. This is like a little tree with spinel twins all over it! 5.2 x 3.3 x 0.4 cm
A HIGHLY UNUSUAL compliment to a Tsumeb collection. This is a sawed piece of Tsumeb smelter slag with copper, malachite and CHARCOAL chips! Rarely preserved, obviously. An interesting smelter product from an old collection 5.7 x 5.7 x 3.5 cm
This large, dramatic and sculptural Michigan copper came out of the Seaman Mineral Museum collection. The pics do not come CLOSE to capturing the incredible flashy new-penny brightness of this copper! But you CAN see how wonderfully scuptural the piece is, a sort of garland, with some matrix. If you prefer to see more matrix, it can be beautifully displayed from the other side as well, with a chunk of matrix at the bottom setting off the copper. 13.4 x 11.4 x 4.2 cm
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Rob Lavinsky, rob@irocks.com
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