What's not to love about these natural rock crystal rondell beads. On a 16" strand, these smooth and polished rondell rock crystal beads measure 8 x 5mm on average. Surely you could use these versatile gemstone wonders in your bead stash. Rock crystal is said to protect the wearer from bad dreams. Placed under your pillow, rock crystal can be used to treat insomnia. Don't you think its time to get some of these gemstone wonders for yourself?