Rainbow Crystallite

"A type of "crystallite," within which dwells a mysterious power. It has the power to draw out human potential and there's great demand for it among adventurers. Some theorize that crystallite was made by the Creator in ancient times to promote human evolution, but the truth of the matter remains uncertain. Specimens of crystallite with an ever-changing, rainbow-like coloration are special and have the power to further improve the magical acumen and techniques of those who use them."