These unique earrings are Boulder Opal Matrix. Boulder Opal Matrix is organically formed when the ironstone and opal were naturally mixed (millions of years ago) to form stunning colours and patterns. The natural formation allows us to create gorgeous unique organic opal jewellery. These opal earrings have glowing bright turquoise/ blue colours sparkling from the natural rich chocolate brown ironstone, they are set with high quality anti tarnish sterling silver as drops from a hook. They measure 50mm in entire length with the opals alone measuring 30mm x 15mm.