All of our jewelry is guaranteed authentic by our Graduate Gemologist of the Gemological Institute of America (GIA). Filigree 10k Gold Genuine Black Onyx Necklace Onyx and Pearl Bead Accents #J7263 Art Deco 10k white gold filigree pendant featuring a rectangular black onyx panel. The onyx measures about 14mm x 10mm. The pendant measures 1 1/4" long with filigree bail and has an attached original chain; wearable length is 16 5/8". There are nine small faux pearl accent beads and four oval black onyx beads. The necklace weighs 1.92 dwt., and dates from the 1920-40s. Gorgeous! Please note: This item may be slightly under the karat stamp due to year of production or composition variances - such as sizing or modifications - as they may affect metal purity. Vintage pieces generally have a slightly lower karat percentage than the stamp. SKU#J7263. 100% Satisfaction Guaranteed!