Lub raj sapphire uas tau ci ntsa iab yog ib qho khoom siv ua tau zoo uas ua los ntawm monocrystalline aluminium oxide (Al₂O₃). Los ntawm kev loj hlob ntawm cov siv lead ua thiab kev txhuam kom raug ntau theem, nws muab kev sib xyaw ua ke ntawm kev pom tseeb ntawm qhov muag, kev ruaj khov ntawm lub cev, thiab kev ua haujlwm ntev ntawm thermal uas ob peb yam khoom siv tuaj yeem sib piv. Cov nplaim du ntawm ob sab hauv thiab sab nraud ua rau lub teeb ci ntsa iab zoo heev thiab muaj kev ua qias tsawg, ua rau cov raj sapphire tsis tseem ceeb hauv kev siv kho qhov muag, semiconductor, kev tshuaj xyuas, thiab kev lag luam.
