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4 specimens found
1 |

Copper in Calcite
stock #18.1-696
Onganja Mine, Windhoek District
Khomas Region, Namibia
4.9 x 3.8 x 3.5 CM (miniature)
price: $1950
Dec 2018

An exceptional (and very unusual) Copper in Calcite from the great Onganja Mine. A large sharp transparent Calcite 3.8 CM across sits on and is included by Copper. The matrix is partly Copper, Malachite and Chalcotrichite. The Calcite is unlike most from Onganja as it is a simple modified rhomb without the complex habits or twinning that is typical from here. This displays well from most any angle, in very good condition with only very minor rub spots. The Onganja mine was once a prolific source of fine Coppers, Cuprites etc but the Calcites were always especially rare and sought after. The mine has been closed and flooded for years. This specimen is quite striking in person and a significant Copper.
Copper -spinel twinned
stock #18.AX-499
Emke Mine, Onganja, Seiis
Khomas Region, Namibia
3.9 x 1.2 x .4 CM (miniature)
price: $100
Dec 2018

A spire of interlocked spinel twin Copper crystals with side branches and sharp terminations. From the now classic, closed Emke mine at Oganja, this is the style and habit that are distinctive for this locale. No damage, nice patina and especially nice under magnification. Larger examples from this locale are highly desired and now very expensive. This is a choice smaller piece that is perfect and affordable. .
Copper with Quartz
stock #18-AX 19-163
Onganja Mine, Windhoek District
Khomas Region, Namibia
5.1 x 2.8 x 1.7 CM (miniature)
price: $350
Spring update

A crystallized sculpture of Copper from the famed Onganja mine that has several crystallized Quartz clusters perched. In fine condition, the Quartz seems to have formed on a Calcite core. A rare association, the tiny Quartz crystals are very clear, adding a sparkling accent. The Copper is in branching crystals with some showing crude spinel twinning and flattened, stretched octahedrons. Quartz is not a common association in these coppers.
Cuprite coated by Malachite
stock #Alec 11-226
Onganja Mine, Windhoek District
Khomas Region, Namibia
4 X 3 CM (miniature)
price: $1450
Spring 2013

An important classic, the find of these fantastic Cuprites was made 45 years ago, there have been none since. These are now very rare on the market and this one is in fine condition. On the base and in one corner the malachite coating did not form and the bright red Cuprite is clearly seen. Some chipping is present on backside and underneath but the display side is clean and undamaged. Great color and textbook sharp form are what sets the best old Onjanga Cuprites apart.
4 specimens found
1 |