5 yam koj xav tau yuav ua li cas hais txog cov hniav nyiaj hniav kub zoo, raws li peb qhov kev paub 10 xyoo.

1. yam tsawg 92.5% cov ntsiab lus nyiaj;
2. zoo txhuam rau ntawm qhov chaw;
3. yog tias nrog cubic zirconia, ces yuav tsum yog qib AAA zoo;
4. kub kub los yog dawb kub plating, txheej plating yuav tsum tuab txaus;
5. zoo tiv thaiv kev tiv thaiv kev lag luam.