This Swirly Heart Necklace is bronze with a genuine Ethiopian opal set in 18K gold with a silver back. The pendant is about 1.5″ x 1.5″ and comes on a heavy sterling silver chain. It is bold, beautiful and impressive with a nice weight. You may order this one or you can customize the central stone. Email or call me and we’ll see what we can work out. This piece makes an amazing gift for a Rabbi, Cantor, or Mother’s Day. It is perfect to be worn at temple for High Holy Days, weddings, bar/bat-mitzvahs.