18K Gross Wt: 1.78 gm, Net Wt: 1.68 gm, Dia Wt: 0.50 ct 14K Gross Wt: 1.68 gm, Net Wt: 1.57 gm, Dia Wt: 0.54 ct 9K Gross Wt: 1.35 gm, Net Wt : 1.25 gm, Dia Wt: 0.50 ct