It is difficult to get just copper chisel chips anymore. This specimen with both copper and silver is unique. As shown in the photos there is a generous amount of silver. This piece was acquired from the collection of John Perona in August of 2014. I in turn purchased it from Michigan collector, Ed Coleman, last week. It is from the Cliff Mine, Keweenaw County, Michigan.
A large tanzanite crystal measuring 6.5cm in length and 3.8 cm in width! The color ranges from a deep translucent blue in the center/bottom of the crystal to a combination blue and white around the balance of the crystal. A clear 1.2 cm quartz crystal sitting on the front edge of the tanzanite crystal provides added aesthetics. This specimen is from Merelani Hills, Lelatema Mts., Simanjro District, Manyara Region, Tanzania.
Undamaged grouping of tan colored calcite crystals projecting prominently from a matrix which is covered with a first generation of smaller white calcite crystals. The top crystal is twinned. An unusual locality for me in that it comes from Gralex Quarry, Mont-sur-Marchienne, Charleroi, Hainaut Province, Belgium.
Beautiful transparent blue to mauve color cubes up 2.0 cm on edge. Crystal edges are bevelled, (I believe the modified cubes are correctly described as tetra hexahedrons). Scattered pyrite is visible in the crevices around the perimeter of the specimen. The specimen is from the Jamina Mine, Corrales, Berbes – Caravia, Austurias, Spain.