The Methods: Used to cut stone and gems can also be indicative of age.
石头和宝石的切割方法也与年代有关.
Until recently gems have been considered an illiquid asset.
直到前不久,钻石一直被认为是流动性不足的资产.
...the finest gems, mined from all corners of the world.
从世界各地采掘来的最精美的宝石
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