This whopping 6,085-carat opal from Lightening Ridge, Australia is one of the most beautiful opals in the world, and for good reason. Its graceful, layered formation is just one of its most striking features. Experts believe it takes 5-6 millions of years to create about an inch of opal, so this could be 20 million years old. You’ll be mesmerized by the print, which is reproduced by the Giclee process and enlarged in high resolution for a better viewing experience. These 1-inch thick, polished blocks stand upright on flat surfaces and are made from a superior cast method for clarity, depth, and realism. They’ll make a stunning showpiece on your shelf, desk, or table. Photo credit: Robert Weldon.