Sapphire siv lead ua yog cov khoom siv tseem ceeb hauv kev lag luam niaj hnub no. Nws muaj cov khoom siv kho qhov muag zoo heev, cov khoom siv kho qhov muag thiab tshuaj lom neeg ruaj khov, siab zog, hardness thiab corrosion kuj. Nws tuaj yeem ua haujlwm ntawm qhov kub siab ntawm ze li ntawm 2,000 ℃, thiab muaj g ...
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