Portal Necklace v3 (Medium, Full Mega Pavé, Blue Diamond Slabs, PA+BDIA)Portal Necklace v3 (Medium, Full Mega Pav, Blue Diamond Slabs, PA+BDIA) from Parts of four. Dimensions: Portal diameter: 55 mm Chain Length: 740 mm Weight: 57 grams Composition: PA: Polished sterling silver. DIA: Rough Diamond. The stones used in this item are cuts of diamond material that are removed from a larger chunk of diamond as they are attempting to get to the perfect diamond in the center. Each stone fragment and shape are absolutely unique.