Black Opal is a rare and valuable gemstone known for its dark body tone and vibrant play-of-color. Unlike other opals, it features a black or dark blue background that enhances the brightness of its colorful flashes, which can include hues of red, green, and blue. This unique appearance makes it highly sought after in the jewelry market. Originating primarily from Australia, particularly the region of Lightning Ridge, black opals are formed from silica gel that solidifies over time. The gemstone's value is determined by factors such as color intensity, pattern, and clarity. Due to its rarity, black opal is considered one of the most precious types of opal available.