Opal Doublet 2D Size

Opal Locality: Coober Pedy, Australia
Size: Oval 6x4, 7x5, 8x6, 9x7 mm
 
-An opal doublet is a layer of precious light opal bonded to an ironstone backing. The opal we used is from Coober Pedy; the ironstone we used is from Queensland.