Basic knowledge of buying jewelry
Jewelry measurement unit 1 g =5 carats =20 beads; 1 carat = 0.2g = 100 point; 1 zuk =0.25 carat =0.05 gram; 1g = 0.32 1 Moz； 1moz = 31.1035g.1inch = 25.4mm；; 1 mm =0.03937 inch; 24K= 100% gold; 22K=9 1.67% gold; 20K=83.33% gold; 18K=75% gold; 12K=50% gold; 9K=25% gold.