Gem Phenomena
In gemology, a phenomenon is an unusual optical effect that is displayed by a gem. Play-of-color, labradorescence, iridescence, adularescence, chatoyancy, asterism, aventurescence, lustre and color change are all phenomena of this type.
Read more about this topic: Physical Phenomena
Famous quotes containing the words gem and/or phenomena:
“Love may be the fairest gem which Society has filched from Nature; but what is motherhood save Nature in her most gladsome mood? A smile has dried my tears.”
—Honoré De Balzac (1799–1850)
“There are no moral phenomena at all, but only a moral interpretation of phenomena.”
—Friedrich Nietzsche (1844–1900)