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Lake Superior agate with Copper?
  
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KJ Seraph




Joined: 19 Jun 2020
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PostPosted: Jun 28, 2020 02:52    Post subject: Lake Superior agate with Copper?  

Found this beauty in Central MN not too far from Minneapolis. I am still just learning about mineral and crystal inclusions in agates and what minerals and crystals are in Minnesota.

Is there a good book out there that lists all rocks and where they are from from each state?



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James Catmur
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PostPosted: Jun 28, 2020 03:52    Post subject: Re: Lake Superior agate with Copper?  

MinDat is a good source

https://www.mindat.org/feature-5037649.html

It is superb as a source and you can search by mineral/state.
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Pete Modreski
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PostPosted: Jun 28, 2020 19:27    Post subject: Re: Lake Superior agate with Copper?  

No copper in that agate, KJ. That is just a "regular" Lake Superior agate, and the red color is from iron oxide (hematite) inclusions in the agate. Copper-bearing agate is extremely rare, and is only found a one or two mines in the Keweenaw, and people (who know what they are looking for) can search all day to find one or two, or no, specimens.

There are a number of books, aimed at "beginner" rock collectors, about the rocks and minerals found in the Lake Superior region. You can order these online, or at local rock or gift shops. Here are some:

Lake Superior Rocks & Minerals
Lake Superior Rock Picker's Guide
Rock Picker's Guide to Lake Superior's North Shore
Lake Superior Agates
Is This an Agate? An Illustrated Guide to Lake Superior's Beach Stones, Michigan (I like this book particularly; by Susan Robinson)
Lake Superior Agates Field Guide
Michigan Rocks and Minerals
and more!
Good luck and happy hunting,
Pete
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Adbhatti




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PostPosted: Jun 28, 2020 22:05    Post subject: Re: Lake Superior agate with Copper?  

Very Helping post thanks
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