When we go to Tucson, our first stop is Artifactual, because their carvings and choices of stone are stunning. We've never seen copper in a skull before. These rare carvings are copper in agate, and the agate is creamy and slightly greenish. This one 25.6g and is a little over an inch in length. It has a good amount of sparkly copper to it, more than the first one we have.