This enchanting opal is one you won't be able to stop staring at. Weighing 7.75 carats, this opal has an amazing play of colors. Play-of-color occurs in precious opal because it’s made up of sub-microscopic spheres stacked in a grid-like pattern—like layers of ping-pong balls in a box. As the light waves travel between the spheres, the waves diffract, or bend. As they bend, they break up into the colors of the rainbow, called spectral colors. Play-of-color is the result. This opal is the perfect example. It is set into a low profile 14 karat yellow gold setting, held in place by four long, pointed prongs.