Calcite with copper inclusions

  Calcite with copper inclusions  from the Keweenaw Peninsula, Copper District, Michigan, 3.5 x 2.5 x 2 in. (Photo: Jason Stephenson)

Calcite with copper inclusions from the Keweenaw Peninsula, Copper District, Michigan, 3.5 x 2.5 x 2 in. (Photo: Jason Stephenson)

 Another view of the specimen. (Photo: Jason Stephenson)

Another view of the specimen. (Photo: Jason Stephenson)

Pala International has re-acquired a calcite with copper inclusions from the Keweenaw Peninsula in Michigan. It was formerly in the collection of Ben Williams, which will be featured in an upcoming edition of Mineralogical Record. This specimen was our featured item for April 2011 and we're delighted to offer it again.

Here's the description we gave the first go-round:

It has a beautiful scalehedron structure, a massive white calcite in the core and a clear outer layer including the peak of the crystal, which is transparent. The center layer is a brilliant copper phantom that scintillates in the light.

With impressive size, shape and color this specimen is definitely an icon in the mineral world. No damage, no repairs, just a pristine beauty.

This specimen was collected by Ben Williams’s father, John Williams, in the 1860s. During this time period the elder Williams worked at the copper smelter in Hancock, Michigan. Ben would have been a young teenager at the time. These pieces were likely passed on from father to son and pre-date Ben’s arrival at Bisbee, Arizona by about 15 years.

Most of these copper-in-calcites came out in the 1800s and early 1900s. The two main mines that produced this rare blend were the Quincy Mine and the Franklin Mine around Hancock, Houghton Co., in Michigan.

 

This specimen was featured in the June 2015 issue of our newsletter Pala Mineralis

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