Ruby, the common name for the mineral corundum in its red form, is a precious gemstone.

红宝石是对红色矿物刚玉的俗称，它是一种珍贵的宝石。

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Only red corundum is entitled to be called ruby, all other colours being classified as sapphires.

只有红色的刚玉可称为红宝石，其他任何颜色是命名为蓝宝石。

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Synthetic corundum may synthesize into sapphire and ruby.

成的星光红、蓝宝石。

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Synthetic corundum may synthesize into sapphire and ruby.

成的星光红、蓝宝石。

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