Mark Hileman inlaid Australian opal and diamond band. Top quality Lightning Ridge Australian opal accented by .60cts. of VS-G diamonds pave` set in 14k gold. This is some of Australia's best opal and is becoming quite rare. All of our jewelry is made in the USA in Phoenix, Arizona by Mark Hileman and his sons, John Hileman and Matt Hileman. We focus on quality not quantity. Our superior materials and outstanding craftsmanship are evident in every piece of jewelry produced. Each piece is signed "MMH" by Mark to certify authenticity and are sure to become collector items.