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博兹瓦纳国营钻石公司 Okavango 上周公布一颗新切割完成的20.46ct蓝钻——「Okavango Blue」,据称这是该国迄今出产最大的一颗切割蓝钻,其命名源自博兹瓦纳一处野生动植物集聚的热带沼泽地「奥卡万戈三角洲」(Okavango Delta)。
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