Lub pas dej mosaic xav tau cov ntaub ntawv siab dua. Nws yuav tsis tawg lub hardness ntawm cov pobzeb mosaic thaum muas ib qho kev cuam tshuam maj mam. Tsis tsuas yog lub hardness zoo dua, tab sis nws kuj xav tau ib qho degree ntawm toughness. Qhov no yuav tsis yooj yim tawg, thiab nws yuav tsis tawg tom qab paving. Lub hardness ntawm lub iav mosaic tsis txaus yooj, yog li nws yog feem ntau yooj yim rau tawg. Ceramics mosaic yog tsim los ntawm 1200 degrees ntawm qhov kub thiab txias. Cov plooj (porcelain) muaj qib siab ntawm qib thiab muaj zog hardness. Muaj ib txheej ntawm crystal glaze nyob rau saum npoo ntawm ceramic mosaic, uas ua rau kom yooj yim ntawm cov ceramic mosaic. Tsis tas li ntawd, cov porcelain ceramic mosaic tseem yuav nqus dej me me, ua kom yooj yim ntawm cov ceramic mosaic puv.
