Copper "Skull" / Locality - Centennial Mine, Houghton County, Michigan


Shipping to United States: Free

A unique old classic from the upper peninsula of Michigan from the collection of my grandfather, Dave Bergman. For those who don't know, Dave Bergman was the foreman and operated the Sweet Home Mine for my father in the late 1970s when they were mining world-class Rhodochrosite specimens. This piece is a really interesting example of the famous Copper "skulls" from Michigan, which formed as a result of Copper flowing over rounded conglomerate, which later disappeared leaving only the hollow shells of Copper behind. What makes this piece stand out from others I've seen from this area is the fact that it doesn't feature a lone "skull" but rather a semi-"flower"-shaped group featuring a few "skulls" with isolated "petals" of Copper flaring out from the sides. The piece has outstanding three dimensional form and looks amazing from several angles. It's rare to find multiple "skulls" on one piece, let alone a large showy group with such eye-catching form. To top it off, the piece has a rich bronze patina all the way around which is a great characteristic of these old time specimens. I love how beautifully the piece sits and displays on its own without the aid of a base or clay. This is a special piece, not only because it came from my grandfather, but because it truly does not resemble any other Copper "skull" specimen I've seen from this tremendously rich and historic mining district. For reference, my grandfather acquired this specimen from the estate of Waldo Butler. Waldo acquired it from the estate of his father, Bert S. Butler, the famed author of the USGS Professional Paper 144 "The copper deposits of Michigan" from 1929

ex Dave Bergman collection

Locality: Centennial Mine, Houghton County, Michigan

Specimen Size: 14.5 x 11.8 x 9.3 cm (cabinet)

Shipping from United States

Processing time

1-3 business days

Estimated shipping times

  • North America : 2 - 5 business days
  • Europe : 7 - 14 business days
  • Australia, New Zealand and Oceania : 10 - 20 business days
  • Asia Pacific : 7 - 14 business days

I'll do my best to meet these shipping estimates, but can't guarantee them. Actual delivery time will depend on the shipping method you choose.

Customs and import taxes

Buyers are responsible for any customs and import taxes that may apply. I'm not responsible for delays due to customs.

Payment Options

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  • Accepts Etsy gift cards

Returns & Exchanges

I gladly accept returns, exchanges, and cancellations

Just contact me within: 14 days of delivery

Ship items back to me within: 30 days of delivery

Request a cancellation within: 2 days of purchase

But please contact me if you have any problems with your order.

The following items can't be returned or exchanged

Because of the nature of these items, unless they arrive damaged or defective, I can't accept returns for:

  • Custom or personalized orders

Conditions of return

Buyers are responsible for return shipping costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value.

Questions about your order?

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