Here is an approximately 11.00Ctw Boulder Opal and Diamond Ring set in 18k Gold. The center is an Opal on matrix that has a moving rainbow of moving colors that have opalized in the host iron stone. This flashes all sorts of colors and is an amazing natural stone that has been examined by the Gem lab. It has been surrounded by approximately 1.00Ct of D-F Vvs1-Vs2 Diamonds. The marked 18k Ring is size 6.25 and it will be sized upon request. This has an auction estimate of $3,000-$3,500 and a 25% auction fee will be added to any approved bid.