18K Gross Wt: 0.75 gm, Net Wt: 0.59 gm, Dia Wt: 0.74 ct14K Gross Wt: 0.68 gm, Net Wt: 0.53 gm, Dia Wt: 0.74 ct 9K Gross Wt: 0.59 gm, Net Wt : 0.44 gm, Dia Wt: 0.74 ct