Tanzanite

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.

Vivid emerald green crystals spread across much of the matrix. Excellent condition. This specimen is from Altyn Tube, Kazakhstan.

Very attractive group of well crystallized copper with a black tenorite patina coating. This specimen is from the Cliff Mine, Keweenaw County, Michigan.

This specimen comes from a Canadian collection which was focussed on native elements. This was originally purchased from an old stash with was brought to market 20 years ago. The specimen displays herringbone-patterned spinel-twinned silver crystals. It comes from the El Bonanza Mine, Port Radium, North West Territories, Canada.

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.