Rare three-strand necklace in natural degradé pearls, platinum and diamonds

Long necklace with natural saltwater pearls, degradé, one substituted is cultured, clasp set with rose-cut diamonds for ct 0.90, gr 46.87, to be strung back. The clasp bears the French platinum hallmark, a dog's head, and is engraved with the number 106661, accompanied by R.A.G certification number JR25014 dated 22.04.2025.