13 Carats, Andamooka Black Matrix Opal, In The Rough, AAA Quality, Double Sided B5 Brightness. Reds, Gold and Greens on one side and brilliant blues and greens on the other. As good as Matrix gets. 17x15x5.6mm no weight to lose here. If opal is about colour this is the best it gets. It shines in every light and every direction. Hard to pick a side is better that is how good both are.
