18.5 carat solid lightning ridge DARK/GREY Opal with a rare bright red-electric orange-gold-green (also some turquise-golden) PEACOCK pattern- / colorplay (see video) .INCREDIBLE COLORPLAY!! . best to view the colorplay in video.. Unique, one of kind opal. Video is a bit too DARK. BASECOLOR IS LIGHT GREY . THIS IS NO DOUBLET OR TRIPLET!! Its a solid Natural Opal!! . Perfect Shape and Size for a pendant of for collectors