I believe I read the diamonds will glow under ultra violet light... I have checked some stones with light, but have yet to find a diamond
Beautiful quartz clusters,diamonds(rarest of all) garnets,jade and much more in kalif,just gotta look. Good book is Gems/ Minerals of California as plenty of spots. My favorites are garnets of many colors in Mariposa county,nephrite jade, fossils all over the state and GOLD GOLD GOLD never gets old and the platinum group nuggies even more better-John