REAL Double Strand Pearl Necklace

Sustainability sourced freshwater pearls hand knotted in silk cord. 18k white gold plated lobster claw clasp and butterfly with cubic zirconia pave. Shorter strand is 16.5" long, pearls are 7mm wide. Longer strand is 17.5" long, pearls are 4mm wide. Necklace is not meant to separate: strands are combined in the same clasp and butterfly is knotted in, it doesn't come off. How to tell if pearls are real: rub them against your teeth and it feels gritty.