Professional bead Cord by Griffin for the threading and knotting of gemstone and pearl chains. Per plate 2 m length, fixed with a needle at the end. Material natural silk. Natural Silk has a very good tensile strength and can be processed and knotted very well by its softness.
Guideline stone size-Thread thickness: Less than 4 mm-No. 1 and 2 Approx 4 mm-No. 4 CA 6 mm-No. 6 Approx 8 mm-No. 8 10 mm and larger-No. 10 to 14
This is just a rough guideline, stone drilling can be very different. Optically large bores can be very tight inside the stone.