Twin Buttes Mine, Twin Buttes, Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA
Image is 3 mm wide. Copper crystals included in clear gypsum.
© 2004 by Dominik Schläfli. All rights reserved.
Greenish-yellow fine grained nontronite with small black patches of manganese oxides. The green veinlet contains what appears to be gray green actinolite and green epidote.
© Van King
Gray-green to green actinolite (probably nickeloan) with olive-green epidote in greenish-yellow nontronite with small black patches on manganese oxides.
Sample size: 5,5 X 4,5 cm Ex C.Nowak collection (France) Collection and photo: Arliguie M
© Arliguie M
Dimensions: top specimen 1.5" x 1.5" x 1", bottom 2" x 1" x 1". Two pieces of the chalky chartreuse-colored clay mineral nontronite.
Twin Buttes, Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA
Medmontite-(Cupromontmorillonite) sample with 4cm - March of 2014
© Photo & Collection of Martins da Pedra
Dark green, translucent, bladed twin Atacamite crystal on Chrysocolla pseudomorph, 4mm field of view. Former Dick Morris and Mark Hay collection, and Mark Pecha collection. Rolf Luetcke specimen and photo.
Transparent, yellow cluster of baryte crystals on allophane coating azurite and malachite over iron oxides. They were labeled as wulfenite but are clearly not. Former Dick Morris, Mark Hay and Mark Pecha collections. Rolf Luetcke specimen and photo.
Spinel twinned copper in a garnet skarn matrix. Brent Thorne specimen and photograph.
© Brent Thorne 2010
Dark green, bladed, twin atacamite crystal on chrysocolla pseudomorph. Former Dick Morris and Mark Hay collection, and Mark Pecha collection. Rolf Luetcke specimen and photo.
A vug of calcite crystals with dendritic copper. 5.5cm wide. Rick Dalrymple Collection & Adrienne McElwain Photo.
© Rockpick Legend Co. & Rick Dalrymple
Transparent, yellow crystals of baryte on allophane coating azurite and malachite over iron oxides. Former Dich Morris, Mark Hay, Mark Pecha collections. Rolf Luetcke specimen and photo.
Crystallized dendritic Copper crystals included in clear Gypsum. Interestingly the copper somewhat resembles a sword. This specimen was given to me by Bob Rothenberg. Thank you Bob.
© Alex Earl 2016
Dendritic native copper and chlorite included in selenite blade. FOV 4 cm for each close-up. The other photo shows a full view of the specimen. Photographed by, and in the collection of Dan Costian.
© Dan Costian
Dark green pockets of Atacamite at top, largest pocket 1cm across, blue Azurite and light blue to green Chrysocolla. Baryte crystals are tiny and not visable in this photo. 6cm by 5cm. Former Dick Morris, Mark Hay and Mark Pecha collections. Rolf Luetcke specimen and photo.
Dark green crystals of Atacamite in 1cm pocket, smaller pocket to the right with Azurite and Chrysocolla. Former Dick Morris, Mark Hay and Mary Pecha collections. Rolf Luetcke specimen and photo.
Tiny cuprite crystals on gossan. Collected by Bruce and Jo Runner in the 1980s, via Dave Shannon. K. Nash specimen and photo.
Crystallized dendritic Copper crystals included in clear Gypsum. Some areas of the Copper are exposed, and have a black coating of what is likely Chalcocite. This specimen was given to me by Bob Rothenberg. Thank you Bob.
Indistinct brassy massive component of sulphide ore. Purchased in 1992.
© Andrew Hodgson
Sharp clear colourless calcite crystals on unknown black matrix partially coated with small black masses of an unknown species. Purchased from David Shannon Minerals in 1990.
Typical pale blue botryoidal chrysocolla in a vug in matrix, and vein fillings. Purchased in 1983.
Colorless, soft allophane over malachite with yellow baryte. Rolf Luetcke specimen and photo.
Rich yellow-green, fine-grained nontronite with about 15% admixed silica in matrix. Purchased from David Shannon Minerals in 1990.
Unusual, rather ugly specimen of crudely-crystalline aurichalcite on matrix from an old collection. Purchased from Excalibur Cureton Company in 1994.
Senator Morgan Mine group, Twin Buttes, Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA
Senator Morgan mine. The ore zone crops out along the low ridge to which a trestle bridge extends from the shaft. On the extreme left is part of the dump of the old shaft. Plate 16-C in U.S.G.S Bulletin 725 (1922). Photo courtesy of USGS.