25.70g Native Copper Branch Specimen - Keweenaw Peninsula, Michigan

Origin of specimen: Keweenaw Peninsula, Michigan, United States
Acquired from the collection of a longtime Canadian mineral dealer who was based in Quebec.

The Keweenaw Peninsula in Michigan’s Upper Peninsula is one of the world’s most famous native copper districts. Copper occurs here as natural metallic masses within ancient basalt lava flows of the Midcontinent Rift, formed over 1.1 billion years ago. Historic mines such as the Calumet & Hecla and Quincy produced exceptional specimens and helped shape North American mining history. Today, native copper from Keweenaw is prized for its sculptural forms, sharp crystalline features, and classic Great Lakes provenance.

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This product ships worldwide from our shop in Wilberforce, Ontario, Canada! Our processing time is about 1-3 business days.

Shipping time varies. Here are some estimates:

Canada: 2-8 business days

United States: 3-8 business days

International: 8-15 business days