合成星光宝石原料，红星光，蓝星光

材质

其他

材料来源

人造

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特性 properties	合成紅/藍星光 created star ruby created star sapphire	天然紅/藍星光 natural star ruby natural star sapphire
類別 classification	剛玉 corundum	剛玉 corundum
化學成份 chemical composition	ai2o3	ai2o3
硬度（摩氏） hardness (mohs)	9.0	9.0
折射率 refractive index	1.760-1.769	1.760-1.768
比重(g / cm3) specific gravity	3.98-3.99	3.90-4.01
熔點 melting point	2,320oc	2,050oc