Ruby deposit of marble type is one of the most important types of ruby and sapphire deposits.

大理岩型红宝石矿床是红蓝宝石矿床的最重要类型之一。

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Ruby deposit of marble type is one of the most important types of ruby and sapphire deposits.

大理岩型红宝石矿床是红蓝宝石矿床的最重要类型之一。

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