Purchase White Onyx Rune Sets today from Natural Agate. White onyx is verity of onyx in white colour's natural and beautiful stone with wide variations featuring a white icy background and veins of golds and grays. It is the blended variety of oxide mineral and chalcedony. Vintage and antique pieces containing onyx are usually quite valuable, as are some fine mixed gemstone pieces. Value increases dramatically when the stones are showcased in precious metal settings, including yellow, white, or rose gold; platinum and other precious metals are also used in setting fine onyx.