Rainbow Blaze Boulder Opal RingThis dainty, elegant design sure does pack a punch of colour! There are so many vibrant colours in this opal that blaze as they glow from within the stone. The warm gold setting complements this, making the stone shine all the more brightly. With a simple design, this ring lets the 0. 8ct black Black Boulder Opal shine as the hero. Set in an 18ct yellow gold bezel setting, all the colours packed into this opal shimmer as the vibrant reds, blues and