Fully faceted Crystals Flatback Rhinestones.  These stones are 100% lead free, unlike most acrylic beads.  They are manufactured and faceted with a laser beam, creating their detailed light effects.   They literally turn the color of what ever thay are attached to, and reflecgt all light and color in the room.  They are truly stunning.  Finding them in a 22mm size, 3/4 of an inch, next to impossible.  Also available in 12mm.