Fantastic Dark Crystal Opal Pendant set in Gold there are beautiful colours blue-green-tangerine, quite big size for semi black opal, perfect oval shape, pleasing shape, 100% natural. For Natural Opal Jewellery from the website in the featured video, please go to www.AustralianOpalJewellery.com.au. For information about opal or visit the Opal Museum in Brisbane Australia go to www.BrisbaneOpalMuseum.com.au