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)
“Hence anyone who seeks for the true cause of miracles, and strives to understand natural phenomena as an intelligent being, and not to gaze at them as a fool, is set down and denounced as a impious heretic by those, whom the masses adore as the interpreters of nature and the gods.”
—Baruch (Benedict)