Bling Jewelry CZ Synthetic Opal Oval Pendant Rhodium Plated Necklace 18 Inches Wear the night sky with this star inspired simulated opal birthstone necklace. October babies are sure to love this 18in rhodium plated necklace with oval blossom bling. Like a crown, the CZ rays of this pendant make for a dynamic 0.83in charm she&#039;s sure to love. Measure: 0.83in x 0.43in With 18in Chain, Weight: 2.7 Grams, Stone: 1.6mm Opal: 8mm x 6mm, Material: .925 Sterling Silver, Cubic Zirconia, Opal, Rhodium Plated.