The jewels Omniaoro® They are entirely in 18 kt gold - 750/1000 accompanied by a guarantee certificate and an elegant package. Material: 18 Kt 750/1000 yellow and white gold Finish: Lucid Top dimensions: 9x13 Weight: 4.20 gr NB Other sizes available to order Its value is determined by more manufacturing weight The weight of the jewel may vary by 3% both by excess and by defect.