Precious Opal is a unique gemstone known for its vibrant play of colors, a phenomenon called "opalescence." This occurs due to the microscopic silica spheres within the stone, which diffract light and create a spectrum of colors. Precious opals can display a range of hues, including blues, greens, reds, and yellows, making each stone distinct. Found primarily in Australia, Ethiopia, and Mexico, precious opals are often used in jewelry. They can vary in transparency, with some being more translucent while others are opaque. Due to their beauty and rarity, precious opals are highly valued by collectors and gem enthusiasts alike.