Copper - spinel twin
Ray Mine, Ray District, Dripping Springs Mountain, Pinal county
2.8 x .9 x .5 CM (thumbnail)
Slender, elongated spinel twins of Copper from this classic USA locality. This looks fine from all angles; it comes from the Larry White thumbnail collection. A good example for the location and a choice thumbnail.
Copper - branching crystals
Santa Rita, Grant County
3.3 x 2.6 x 1.2 CM (small miniature/ large thumbnail (toenail))
A complex branching Copper specimen composed of many small crystals in stacked or aligned arrangements. Good patina, the color ranges from a dark that is almost black to a red copper hue. A multitude of tiny crystals in many divergent habits are best appreciated under magnification.
A perfect small thumbnail of native Copper that has faithfully replaced a hexagonal Aragonite crystal. The Aragonite form is textbook perfect and the patina is a choice red copper hue. No damage, complete all around this is both sharper and with better color than usually seen. These pseudomorphs were found more than 30 years ago and not since. Ex Larry White collection.
Copper - well-crystallized
Tongshan Mine, Guichi Dist., Chizhou Pref.
6.8 x 4.8 x 5.3 CM (cabinet)
Well-defined, sharp Copper crystals from China are very rare on the market, nearly non-existent. I can not recall seeing better formed crystals than these, most are quite crude or flat habit. These crystals are very well formed, mostly dodecahedral with some modified cubes. The Copper matrix is a spongy mass with a reddish color composed of more tiny copper crystals and masses. A nice copper from anyplace but outstanding from China. We obtained this in China in 2008, sold it then and now have it back again.
Copper -superb spinel twins
Central Mine, Keweenaw Co.
7.4 x 4.1 x 3.4 CM (cabinet)
Simply fantastic, a very well crystallized Copper with sculptural form much like a tree or cactus. The most prominent twin crystal at the top is 3.1 CM tall and the whole is very esthetic. From the Central mine of Michigan, this classic site produced many excellent spinel twins in its working life. This is well above the quality of "typical" pieces which are now uncommon. A fine USA classic copper that would be desirable from anyplace, a super example of the fames Upper Peninsula copper country. The piece displays great from almost any angle.
Copper -chain of Spinel twins
Proprietary Mine, Broken Hill, Yancowinna County
New South Wales,
5.2 x .8 x .4 CM (small cabinet/ large miniature)
A perfect elongated spinel twin crystal forms the base for radiating smaller spinel twins that are epitaxially oriented. In pristine, undamaged condition this is a really unusual choice old Broken Hill (Australia) piece. The secondary crystals are mostly oriented in two lines or chains some of which form mirror copies of each other. The smaller crystals reach 1 CM and all have textbook perfect forms.
Cliff Mine, Pheonix, Keweenaw County
16.1 x 2 x .5 CM (cabinet)
An antique native copper "finger" or "fan blade" made by skilled hand chiseling long ago. These artifacts were made by miners from the often huge masses of pure Copper encountered in the Upper Penninsula of Michigan. From the John Marshall collection, this is recorded as from the Cliff Mine, such attributions of these artifacts are quite uncommon. Aside from the very hard labor of hammering through solid copper, these fingers required a lot of skill to create such a long straight and clean blade. While not a typical mineral specimen this is a very much a classic Native Copper that has had a major trimming job!
Chain-like stack of arborescent and spinel twin crystals from New Mexico. Ex collections of Buck Keller and William Hladysz, this has just a hint of matrix adhering, but is mostly a sculptural tower of Copper. No damage and with a nice patina, this is an older piece that predates the Chino mine find that became famous in 2001. This piece almost certainly came from the Chino mine zone too, but that is not recorded on the previous label and we do not like to attribute without certainty. The Chino is a huge pit that has now encompassed other smaller mines, so many details of locality have gotten lost over time. A very nice copper from anyplace.