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Tetrahedrite with Chalcopyrite from Nan Dan, Guang Xi Province, China [http://img.irocks.com/new2012/CH1257a.jpg]
Nan Dan, Guang Xi Province, China
Small Cabinet, 7.3 x 4.6 x 3.6 cm
This is a rare tetrahedrite from China, from a new find apparently. It has sharp, textbook crystals to over an inch, some coated on oriented faces by incredibly metallic, bright chalcopyrite in a micro-thin layer. It looks like the tetrahedrite crystals were dipped in gold plate, on those faces. Small calcites are also attached for texture.The piece is nearly complete all around, with just a small contact area on bottom. Although a fine specimen in its own right, I bought this in part because it was a freak piece , to my eyes, just a single nice specimen from "a new mine" in the rich Nan Dan area where so many calcites have come from. Time will tell whether more come, or none...
Tetrahedrite and Quartz from Casapalca Mine, Lima, Peru [http://img.irocks.com/pics/denv08-50a.jpg]
Casapalca Mine, Lima, Peru
Cabinet, 10.3 x 9.8 x 7.7 cm
An exceptional specimen from old finds here, probably in the 1980s, which features huge tetrahedrite crystals to several inches on size in combination with aesthetic quartz crystals. The specimen is in very good shape, nearly pristine and complete most of the way around the back even. It is a piece of high significance, I would say, for both the lcoality and the species. Most that you see fomr here are either smaller crystals of no significance or , in some occasions still today, large crystals to this size and more but very flattenned. I rarely see any with such 3-dimensional geometric form, much less in association with these great quartz crystals which really covnert the piece from "just" an important tetrahedrite into a display specimen on another level entirely to my eye. Ex. Francis Allegra collection.
Chalcopyrite, Pyrite & Tetrahedrite from Mina Maria, Puerto de Cananea, Sonora, Mexico [http://img.irocks.com/new2011/Chalcopyrite-Pyrite-Tetrahedrite-MariaMine-Mexico-108mm-JB458-07.jpg]
Mina Maria, Puerto de Cananea, Sonora, Mexico
Cabinet, 10.8 x 9.8 x 7.5 cm
This specimen has a metallic golden brightness to it that looks manmade-brighter and more metallic even than modern Peruvian material can be. It is an old specimen from the collection of the late Dr. Richard Heck. Displayed one way, there is a large twin to the left, and the piece balances standing up like a triangle. Displayed on its side, the large, complex chalcopyrite twin graces the bottom, and smaller crystals rise above it to form a pagoda of sharp, golden-brassy color. So bright is it, that it leaps out of a case as the most metallic mineral in the Heck collection, amongst sphalerites, pyrites, and other species. It is just vividly colorful and brilliantly lustrous. One of the highlights of this fine old Mexican mineral collection. Joe Budd photos.
Tetrahedrite from Black Pine Mine, Philipsburg, Granite County, Montana, USA [http://img.irocks.com/2014-updates/J14/J1448a.jpg]
Black Pine Mine, Philipsburg, Granite County, Montana, USA
Small Cabinet, 5.8 x 4.6 x 3.2 cm
Very rare for this locality, this one surprised me when I saw it! This tetrahedrite specimen features a large crystal with one huge face, 5 cm in length, which has a smaller crystal perched on it. There is moderate luster, and the crystals exhibit a dark gray color. Overall, a significant piece from this old mine. I had never seen one larger than a 1 cm sized crystal from this deposit. This is from the personal collection of Josef Vajdak.
Chalcopyrite coated with Tetrahedrite on Quartz from Animon Mine,Huaron District,Peru [http://img.irocks.com/pics/pb43a.jpg]
Animon Mine,Huaron District,Peru
Small Cabinet, 9 x 7.8 x 5.5 cm
Large, pyramidal, slate-gray crystals of Chalcopyrite coated with Tetrahedrite , to 3.5 cm in length, have grown in and around translucent, pastel gray, crystals of quartz which reach the same length. There does not appear to be any damage or contact except at the extreme periphery of this matrix specimen. The cluster just floats up there, perfect as can be! Very rare in such aesthetic form!