Shop Pandora Blue Chalcedony Pendant Oxidised Silver Chain Necklace 390320CA-80 at USA's Number 1 Pandora retailer. Complete Collection of Pandora Jewelry Sale. This elegant necklace from the Pandora Stories collection features an oval chalcedony framed in rope-textured sterling silver. The pendant is suspended from a 31.5-inch chain, brought together with a lobster clasp. Style # 390320CA-80.