Material: natural black onyxBead size: 4mm 6mm 8mm 10mm 12mm 14mmHole size: about 0.8mm-1mmLength per strand: 15 inchQuantity: 1 strandQuality: AApprox. how many beads on a 15 inch strand ? 4 mm Approx. 90 beads6 mm Approx. 62 beads8 mm Approx. 47 beads10 mm Approx. 37 beads12 mm Approx. 32 beads14 mm Approx. 28 beads▲ If you need more quantities and wholesale price, Pls feel free to convo us, We will provide all the best for you! Thank you.