Vintage Jewelry Faux Akoya Baroque Pearl Knotted Necklace. I believe these are a good quality heavyweight Plastic set but I am not sure of the exact material. They may be glass as they are heavy but I cannot see the inside of the holes because it is tightly knotted. It is very good quality and is heavyweight. Beautiful Costume Faux Baroque Pearl Necklace. Measures 18 inches Princess Length. Shipped with USPS First Class Mail.