This is a necklace I purchased a few years ago from a pearl specialty store. I've lost the certificate of authenticity, so I'm not sure if it's genuine pearl or not. The clasp is stamped with "silver925". I wore it once for a short time, and then stored it in an accessory box. There is no certificate of authenticity. It's approximately 40cm long. The pearls look yellowish in the photos due to the lighting, but in reality, they are all a beautiful white. The case is not included. I plan to carefully package it and ship it via Yu-Packet Mini.