Metal: Platinum Marked/Tested NR431/ PT, GURHAN, MAKERS MARKS Gemstones/Diamonds Diamond- 0.21ct Clarity: N/A Color: N/A Measurements: Necklace 17 1/2" long, 34mm in diameter (1 inch= 25mm) Weight 9.0g Description: Excellent condition!!! Just purchased inventory from high end jewelry store, all Gurhan merchandise is brand new with tags.