1.51ct Lightning Ridge Black Opal | #E93,Loose Black Opal 22.44ct Multicolor Black Opal Gemstone for Sale, Certified Black Opal from Ethiopia, Natural Gem, Oval 25.8 x 16.9 mm,OPAL 4.69ct NATURAL BLACK OPAL BEST 3D HARLEQUIN MULTI COLOR PLAY HUGE OVAL GEM! | eBay,Black Opal, Black Opal Rough, Raw Black Opal, 9.20 Crt , 15x23 MM, BO55 | eBay,1.51ct Lightning Ridge Black Opal #E93,