I couldn’t imagine carving this into the cones, but to me it does look engraved. Beautiful light blue hoops with shell? strung on string. 3 1/2" long. Two turned out the same, would not let me delete it. As you can see maybe it goes about half way around the cone. Did they use gut string back then? Any help would be appreciated. I have gone through Southwest hallmarks, I didn’t see it. And would it be Navajo? And the kind of turquoise might be?