Genuine Aquamarine Beads Facet Rondelles Natural Transparent ~6mm (Qty=12) Aquamarine beads large size for tansparent beads Average 6mm diameter, 4mm thick, sizes vary 1 1/2 inches if strung, sold unstrung Facet rondelle shapes, shiny, transparent Loose and unstrung not finished jewelry, use 30 gauge wire or .010" cord