'an aurora' .. is the best to describe the pattern of this beautiful boulder opal loose. Very deep, metalic green color keeps runnig across the surface of opal, it just captures your heart. Very very nice piece.
A high quality solid Australian boulder opal loose found from Quilpie, Queensland, Australia, there is no other like this.
Describes the arrangement of opal's play of colour. Please see Learn About Opal to understand more.