These finishes are pre-patinated at the Aurubis mill to create the green/blue/turquoise patina that naturally develops over time with exposure to the environment. The pre-patination process ...
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On the trail of the Paraiba tourmaline: In search of one of the world's rarest gemstones“One of the first qualities I look for in a gemstone is the intensity of its colour, and Paraiba tourmalines truly embody that,” says Morris. “Their unique turquoise blue-green hue, paired ...
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