Cov ntaub ntawv hloov pauv hlau feem ntau yog tsim nyog rau cov plag tsev nyuaj heev, lossis cov plag tsev uas muaj Mohs hardness saum toj 6, uas tuaj yeem tshem tawm cov khawb sab laug los ntawm kev sib tsoo hlau, kom zoo hloov mus rau kev ua haujlwm polishing thiab ua rau koj cov plag tsev ci ntsa iab thiab smoother.