18k Solid Satin Yellow Gold. Center Stone is Rose Quartz Square Cabachon approximate 15mm x 15mm x 10mm and approximate 16CT weight. Has 16 stunning round diamond accents. Eight on either side of ring for an approximate .24TCW. Weighs 18 grams. Designer is Susan Sadler who makes one of a kind pieces. Inside of ring is marked S.Sadler 18k. Will not ship internationally. Sales Tax Applied to California residents is (9.25%). FREE U.S. SHIPPING!!!