Edison pearls are a species of large freshwater pearls with the qualities of a Tahitian and South Sea pearl, at a more affordable price. They have a nacre thickness similar to the South Sea pearl above 2mm, which accounts for the beautiful pearl essence and appearance. Margo Morrison necklace Necklace length: approx. 18 inches 18-karat gold-plated sterling silver Naturally hued freshwater cultured pearls Lobster clasp with champagne diamonds Total diamond carat weight: 0.3 Wipe clean Made in USA from imported materials