Modern Luca Carati 18Kt Rose Gold Necklace Features 2.77cts of F/G Color and VS Clarity Round Brilliant Cut Diamonds Accenting Details on a Cluster of Spherical Charms. The necklace chain is 17 inches at its longest length and is adjustable, the five spheres measure between 10mm-20mm in diameter. This piece totals 47.2 grams.