Natural Mixed Rainbow Tourmaline Semi-precious gemstone round beads Grade A Quantity: one strand approx 15" long Sizes available: approx 4.3mm - 4.5mm (92 - 98 beads) or approx 6mm (60 - 66 beads) Beads sizes do vary between different gemstones or even batches for the same gemstone. Please note that there could be a variation of up to 1mm - 1.5mm in size. Beads hole size reference: 4mm round beads hole size - approx 0.6mm 6mm round beads hole size - approx 0.8mm - 1mm 8mm round beads hole size - approx 1mm 10mm round beads hole size - approx 1mm - 1.2mm
