Ruby
Cov khoom
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Natrual Ruby Loose Gems Baguette 1.5x3mm
Ruby [1], uas txhais tau hais tias corundum ntawm cov xim liab, yog ib hom corundum thiab muaj feem ntau ntawm txhuas oxide (AL 2O 3).Cov xim liab los ntawm chromium (CR), feem ntau yog Cr2O3, cov ntsiab lus feem ntau yog 0.1 ~ 3%, siab tshaj plaws yog 4%.Muaj Fe, Ti thiab xiav hais tias Sapphire, tsis yog-chromium CR xim ntawm lwm cov xim ntawm corundum kuj hu ua Sapphire.
