Synthetic sapphire gemstone
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Txiv duaj liab sapphire khoom Corundum gemstone rau lub nplhaib lossis caj dab
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Ntshav xim violet sapphire Al2O3 khoom rau gemstone
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Sapphire ntsuab rau gemstone txiv ntseej ntsuab dag 99.999% Al2O3 hluavtaws
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99.999% Al2O3 sapphire yeeb yuj liab ruby khoom gemstone
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Ruby khoom Artificial corundum rau lub pov haum oringinal khoom liab liab
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Pigeon ntshav ruby khoom doped Ti3 + Cr3 + rau lub pov haum saib iav