Dimensions: 9.10 x 7.50 x 2.95mm
 
Lightning Ridge black opal is one of the rarest and most valuable gemstones in the world, prized for its intense play-of-color and deep, dark body tone. Mined exclusively in Lightning Ridge, a remote town in northern New South Wales, Australia, black opal forms in cracks and cavities of ancient sandstone, created over millions of years by the deposition of silica-rich water. What sets black opal apart is its dark body color—ranging from deep grey to jet black—which provides a dramatic contrast that makes the vibrant flashes of red, green, blue, and other colors appear even more vivid. Each stone is completely unique, often displaying mesmerizing patterns like harlequin, flame, or pinfire. Renowned for its rarity, beauty, and connection to the Australian outback, Lightning Ridge black opal is considered the "king of opals" and is highly sought after by collectors and jewelers around the world.