This piece has a large young African amber center and smaller pieces behind it.  The green amber is harder to find. At some point years ago, the Japanese bought up huge quantities of African amber and the prices quadrupled. That has slowed down. Currently, the beads are made with some kind of resin with reconstituted amber. They are tribal beads of West and North Africa.   Each piece of amber is joined by a bead of pietersite, a natural stone.