I think I have spoken about this before and it still winds me up! Why would you put metal beads on silk thread?! I know they might be gold, the pearls are nice pearls and you probably paid a lot of money for the necklace. I understand you want it threaded “the best” way, but I promise you that silk is not the way to go! Synthetic strands are awesome! They are strong and don’t stretch and can withstand the nasty sharp edges that your precious beads will get in the future. Trust me!