Tiffany and Co- Rare oversized onyx necklace

Rare find. Note that this was originally a 16” which I had extended at Tiffany for additional cost. Beautiful hand knotted oversized onyx beads with sterling silver detail clasp. Comes with original box and pouch. Hallmarked on clasp. Items will be authenticated via Poshmark as to policy with items $700 and over:)