"engraved stone lettering words" - this is a great tutorial on stamping (rubber stamps and other methods as well) into polymer clay. Tutorial covers a LOT of basic polymer clay techniques, great for beginners
Nocturne Pendant by Klara Borbas. Each concave polymer disc is a different shade of gray. Some has a Mother of pearl sheen. The polymer piece is attached to a stainless steel wire that hangs on a rubber cord with silver clasp.