Boulder Opal Free form Oval

This stone is a large free form boulder opal. This stone has a thin layer of opal so the surface is unevenly polished to keep the stone as beautiful as it could be without loosing colour. 

Size : 27.7 x 14.1mm
Weight : 11.35ct 

1ct = 0.2 grams
All measurements are in millimeters unless stated other wise