Pietersite Ring Size 7.5Pietersite is a rare and beautiful stone with a kaleidoscopic blues and blacks that change colors in the light. Pietersite. Made from . 925 Sterling Silver. Size 7. 5 Handmade by Sydney Hannan All of the items in my collections are handmade and hand finished. Because of this, no two items are exactly alike. These pieces are unique and ready to be passed down for generations.