A distinctive boulder opal with an unusual naturally split pattern , the opal colours have shimmery blue and a deeper blue glistening with touches of  green, gold and red . The opal measures 13mm x 10mm and is set in anti tarnish sterling silver  with a bezel surround to the opal and a band tapering from 6mm down to 3mm on the underside of the ring. The ring is size 7.25