I don't have pictures of all of the bases this top sat on, so I'm just posting this high resolution image. I hope you are able to see the detail of the imbeded coper in the stone.
My cousin had an 'interesting' rock containing native copper in quartz which she slabbed for me. I put the slabs on a top I made in 2014 when I was still using rusted whiskey barrel hoops for rims.
I still have a couple of slabs of the rock sitting in my shop waiting for the proper top/base pair appear, or be suggested by one of my customers. Do you have an idea how to incorporate native copper slabs into a natural stone table top?