17,3 carat solid coober pedy gem Opal with brilliance 5 electric orange-gold--green (also some blue) pattern-flash/colorplay (see video) best to view the colorplay in video.. Mediumdome cut (8.3mm high) Unique, one of kind opal. Please seee video for sides and back (there are some small inclusions). THIS IS NO DOUBLET OR TRIPLET!! Its a solid Natural Opal!! . 2 very thin fractures. Perfect Shape and Size for a pendant of for collectors