N a blue-grey sandstone containing much clay, used for building and paving 胆矾
Only the arrowhead, carved from some milky blue stone, had any color.
只有箭头，是用乳状的蓝宝石雕刻的，发出一些色泽。
Only the arrow head, carved from some milky blue stone, had any color.
只有箭头，是用乳状的蓝宝石雕刻的，发出一些色泽。
Another big blue stone, the Hope Diamond, was not good luck for French royals.
就像另一枚巨大的蓝宝石——希望之钻，没有给法国皇室带来好运一样。
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