Double Terminated Amethyst Quartz Natural Crystals measure approximately 5x3mm up to 7x3mm in size, gems have a highly vitreous luster on the Purple Quartz body. These rare Double Terminated Purple Quartz beads are transparent with internal characteristics in these Straight Drilled Natural Crystals presentation with some beads showing twin crystal features. The Crystals are unique in the gem world because of the natural termination points on each end. These Amethyst Quartz beads are Piezoelectric which means that they transforms Energy into Light / Heat. Extremely rare Double Terminated Amethyst Quartz Crystals are well matched on the strand. Amazing Rare Find!