![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
  | |
![]() |
M377 - Copper $ 125 Ajo, Pima Co., Arizona, USA thumbnail - 2.6 x 2.3 x 0.8 cm ![]() ![]() ![]() ![]() ![]() Diamond-shaped mass of crystallized Copper that appears to have grown in a thin seam. Criss-crossing crystals of Copper are evident along the sides.
M386 - Copper $ 150 Bingham Canyon Mine, Oquirrh Mountains, Utah, USA thumbnail - 2.9 x 1.8 x 1.4 cm ![]() ![]() ![]() ![]() ![]() ![]() Mass of solid crystals from the Bingham Copper Mine. This mine is the largest man-made excavation in the world and is considered to have produced more copper than any other mine in history – more than 19 million tons. One of the largest and highest-grade porphyry orebodies in the world, the mine still produces about 1% of the world's copper. Despite the huge prduction, Copper specimens from this mine are uncommon.
M387 - Copper $ 260 Keeweenaw Peninsula, Michigan, USA thumbnail - 2.5 x 2.5 x 1.5 cm ![]() ![]() ![]() ![]() ![]() ![]() ![]() Thumbnail sized specimen with large, very well formed crystals of Copper.
M388 - Copper with Calcite, Cerussite $ 150 Tsumeb, Namibia miniature - 4 x 3.5 x 3.5 cm ![]() ![]() ![]() ![]() ![]() ![]() Black rock matrix (with included crystals of an unidentified species) with white Rhombic Calcite crystals (old Fraziers label inidcates the Calcite is fluorescent). Copper runs throughout the specimen, and is exposed in the central vug area, along with a small cluster of transparent Cerussite crystals.
M389 - Copper $ 240 Mufulria Mine, Mufulria, Zambia small cabinet - 5.7 x 3.5 x 1.5 cm ![]() ![]() ![]() ![]() ![]() ![]() Thick and sturdy specimen of Copper crystals. There are areas of trnaslucent white Calcite attached and bright, untarnished Copper is visible beneath.
M391 - Copper $ 225 Ajo, Pima Co., Arizona, USA miniature - 5 x 1.5 x 1 cm ![]() ![]() ![]() ![]() ![]() DBeautiful, slightly skeletal crystal of Copper. Complete all around and undamaged with a slightly irridescent surface.
M396 - Copper $ 425 Santa Rita, New Mexico, USA small cabinet - 8.5 x 7.5 x 6 cm ![]() ![]() ![]() ![]() ![]() ![]() Multiple somewhat flat sheets of Copper crystals that grew in fractures around the now mostly gone matrix, leaving a sculptural mass of good crystals.
M393 - Copper $ 275 Calumet, Michigan, USA small cabinet - 7.5 x 6 x 4.5 cm ![]() ![]() ![]() ![]() ![]() ![]() Michigan Copper specimen forming a sculptural ring shaped mass that connects all the way around.
M397 - Copper $ 425 Broken Hill, New South Wales, Australia small cabinet - 6 x 6 x 4 cm ![]() ![]() ![]() ![]() ![]() Thick, heavy formation of solid Copper with a minor amount of attached Calcite. Comes with an old British Museum of Natural History label.
M398 - Chalcotrichite on Copper $ 130 Ray Mine, Arizona, USA small cabinet - 5.5 x 3 x 1 cm ![]() ![]() ![]() ![]() ![]() ![]() Flat sheet of Copper covered by acicular Chalcotrichite (needle-like form of Cuprite).
M379 - Dravite $ 1200 Mwajanga, near Komolo, Tanzania cabinet - 10.5 x 3 x 2 cm ![]() ![]() ![]() ![]() ![]() Large, double-terminated blue-cap Dravite from a unique 2017 find. This one has so many things going for it, most importantly it's large size and good condition with only one bit of chipping along the termination. It features a dark body grading up to a translucent white zone followed by an intensly blue termination. While the dark zone in the majority of the crystals were opaque, this one is translucent, even despite it's larger size (I put a pen light behind it in one photo to show the translucency). The other end is terminated with a more pyramidal shape and has green overgrowths. There is another small Dravite intergrown in this end.
M363 - Dravite $ 280 Mwajanga, near Komolo, Tanzania miniature - 4.2 x 2.6 x 2.1 cm ![]() ![]() ![]() ![]() Thick, terminated blue-cap Dravite from a unique 2017 find. It features a dark body grading up to a translucent white zone followed by an intensly blue termination. Undamaged and weighs 38 grams.
M365 - Dravite $ 280 Mwajanga, near Komolo, Tanzania thumbnail - 3 x 2.6 x 2.2 cm ![]() ![]() ![]() Thick, terminated blue-cap Dravite from a unique 2017 find. It features a dark body grading up to a translucent white zone followed by an intensly blue termination. Undamaged and weighs 37.6 grams.
M357 - Uvarovite Outokumpu, North Karelia, Finland thumbnail - 2.5 x 1.7 x 1.5 cm ![]() ![]() ![]() ![]() Two intergrown deep green Uvarovite crystals to 9mm on Quartz. The central 9mm crystal is complete, with another crystal below and a partial crystal attached to the top. There are small amounts of Pyrite in the Quartz matrix.
K923 - Azurite with Malachite $ 80 Milpillas Mine, Cuitaca, Sonora, Mexico thumbnail - 1.9 x 1.5 x 1.5 cm ![]() ![]() ![]() Cluster of deep blue Azurite crystals with a minor amount of attached Malachite. This is from what is called the Watercourse Pocket of the mine which produced some of the best specimens ever found there. Specimens from this pocket were composed of interlocking, lustrous crystals such as these. Like many from this pocket, it is a floater with small needle-like crystals of Malachite attached. This specimen features a 1.9cm main crystal with smaller intergrown crystals.
©2010-2018 Marin Mineral |