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amethyst mining process

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Description: Aug 17, 2018018332Up until about the 18th century, amethyst was listed as one of the most valuable and soughtafter gemstones, along with diamonds, sapphires, rubies, and emeralds. However, both the relatively recent discovery of vast natural deposits of amethyst and technological advances in the process of mining have driven the value down exponentially.

Pinterest Heavy Industries Co., Ltd. China(Mainland)

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