Vintage Natural Bone Earrings Copper Inlay 12K GF Screw Back 60s Alaska Native

Vintage mid-century screw-back earrings made from natural material (cross hatching schreger lines present), with copper inlay in a cross motif. The backings are marked 1/20 12K GF (12 karat gold-filled). These artisan-crafted earrings have a beautiful warm tone and fine natural grain, with patina consistent with age. See photos for measurements and condition details. * Natural bone material with copper inlay * 1/20 12K gold-filled screw-back findings * Mid-century handcrafted design * No chips or cracks; light surface aging * Similar in style to Alaska Native artisan work