Black opals are one of the rarest gemstones in the world and are renowned for their captivating beauty. They are found primarily in the Lightning Ridge area in northern New South Wales, Australia. What makes them unique is their dark body tone and the vibrant play of color. The dark background acts like a canvas that enhances the color display, making it more pronounced than in other types of opals. This is why black opals are often considered the most valuable type of opal.