A couple of years ago, during our annual buying trip to Tucson, AZ, we noticed a trend at A LOT of gemstone booths: brilliantly-colored quartz crystals, some with vibrant aurora-borealis-type finishes. We thought they were cool from the first time we saw them, and their popularity has only grown since then — these quartz crystals continue to be one of the top-selling bead types at Blue Door Beads!