Enhance your jewelry collection with this exquisite black opal cabochon gemstone. The gemstone has a weight of 6.80 carats and a size of 16 x 16mm. It has a unique trillion shape and an excellent cut grade that enhances the opalescence effect of the stone. This natural black opal has been polished and has an eye-clean clarity grade. The gemstone comes with a 100% natural opal certification, and it's vintage, originating from Ethiopia. It has a smoked treatment and is opaque, making it perfect for collectors and jewelry enthusiasts. If you're looking to add a unique gemstone to your collection or create a unique piece of jewelry, this black opal cabochon is a fantastic option.