dab tsi yog qhov zoo ntawm cov hniav nyiaj hniav kub zoo nkauj, raws li tus muag khoom thiab chaw tsim khoom, peb xav hauv qab 5 tus qauv yooj yim yog qhov tseem ceeb heev:

1) 92.5% ntawm cov ntsiab lus nyiaj yog qhov kev thov yooj yim;

2) zoo txhuam, nto yuav tsum zoo li tiag tiag smoot;

3) tag nrho cov zirconia cubic yuav siv yuav tsum yog AAA qib zoo;

4) plating ntawm nws yuav tsum tau siv geniune kub lossis rhodium, thiab nrog txheej tuab plating;

5) tiv thaiv kev tiv thaiv kev lag luam xav tau rau cov khoom xim kub;