The Play-of-Color in Opals: Science Behind the Magic Opals are renowned for their breathtaking play-of-color, a phenomenon caused by the diffraction of light passing microscopic silica spheres within the stone. This unique structure bends and reflects light, create a dazzling spectrum of colors that shift with movement. The size and arrangement of these silica spheres determine the brilliance and variety of hues. No two opal stone are...