Natural Green Quartz Semi-precious Gemstone round beads Quantity: one strand approx 14" long Grade B 3 sizes available: approx 6mm (55 - 60 beads), approx 8mm (43 - 48 beads), approx 10mm (35 - 39 beads), please choose your preferred size from the drop-down list under the item title Beads sizes or quantities per strand 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 and up to 3 - 5 beads in quantities (due to the size variation). 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