Blue Sapphire Rondelle Beads Facet Natural Genuine 5mm (10) 10 Blue Sapphire faceted rondelle beads 5mm diameter, about 3mm thick, sizes vary, .015" hole; holes too small for stretch bracelets Opaque, light goes through them; hard to find in this size and quality Genuine Natural blue color, small holes, use very fine cord or wire Loose beads for jewelry making, 1 specified buys 10, 2 buys 20, etc.