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Opal is the world's most popular phenomenal gemstone, with many cultures believing that Opals had supernatural origins and power. Inside of Opal are sub-microscopic spheres stacked in a grid-like pattern, similar to a layer of ping pong balls. When light hits theses spheres, the light waves bend and break into spectral colors. This produces a flash of rainbow colors or "Play of Color." White Opal is translucent to semi-translucent with play-of-color against a white background. Opal requires special care due to being extremely soft and can craze from loss of moisture.
Translucent white background with medium to strong play-of-color. Play-of-Color ranges from blue, green, and red.