Potomac Crystal Briolettes - Alexandrite AB. Briolettes are a great way to add an elegant crystal element to your designs. Elongated, faceted and tear drop shaped, Potomac Crystal Briolettes will bring the bling to your beading projects. They are a top-drilled crystal drop bead that can be used as a bead or as a pendant. Have fun creating statement pieces with this colorful crystal. Briolettes measure 5x8mm with a .8mm hole and come in a pack of 25.