boho necklace teal beads graduated lobster clasp metallic. OOAK

these beads are tough to determine its material. To me, it looks like cork, wood or clay. whomever the artisan is, the beads are almost perfectly graduated. the theee large metallic beads have what appears to be wood grains on the back that were painted black, and a resin coating over the metallic front. Each of those beads are 2” long. the four colored beads - black and green, i’m an unsure if it’s a bead or a nut. the necklace is 20” long which includes the 2” extender. It can be shortened to 18” very unique piece. the beadwork is tribal in nature, the color is trending and metallic has had its run on and off through the decades.