Black Glass Briolette Faceted Crystal Beads 6x12mm 50Pcs in a Strand Crystal for Jewelry Making, Multiple facets to increase light reflectivity, and it adds magnificent sparkle to your jewelry or craft piece, crystalized glass, safe jewelry or crafting making component, Decent quality crystal beads; great for all kinds of jewelry or craft making, please give them a try, thank you, hole diameter ~ 1.2mm (~ 0.05 inch)