With a sparking shine and light, gems of this kind called Rainbow Moonstone are one type of feldspar mineral that captures people with their wondrous iridescence. These stones, with their milky white base, embody a dance of colors not unlike moonlight radiating from within the stone. Light that interferes within crystal layers creates an enchanting glow which is called the iridescence. Rainbow Moonstone gems promote emotional harmony and expand spiritual awareness. Apotheosis of stones The draw of these splendors is their incandescent charisma, which can be displayed whether set in jewelry or admired on its own.