The London Blue Topaz Octagon Cut Loose Certified Gemstone weights 16.20 carats and comes from Brazil. With a transparent clarity grade and excellent cut grade, this gemstone is of high quality. The rich blue color and unique octagon shape make it a stunning addition to any jewelry collection. Wholesale opportunities are available for those interested in purchasing this gemstone in bulk. This natural, unenhanced gemstone is perfect for creating exquisite pieces of jewelry that will catch the eye of any gemstone enthusiast.