Australian Solid Semi Black Crystal Opal - 5.00 CtsFull Details: Australian Solid Semi Black Crystal Opal Opal Colour Electric Red Green Gold Purple Shape Free Form Triangle Pattern Broad Rolling Flash Weight 5. 00 Carats Width 11. 10 MM Length 12. 47 MM Height 5. 90 MM This semi Black Crystal Opal is a stunning stone, it has a beautiful cabochon, a broad rolling flash of colour, from Electric Red, Green, Gold, Blue, Purple, on the right angle this stone is something else. The perfect dress or