The fact that a tourmaline comes from a famous mine doesn’t mean it is good quality. But fine-quality tourmalines that have documentation of their Paraíba origin from an independent laboratory like ...
Most green tourmalines are strongly pleochroic. Stones that show attractive colors in both directions—such as bright green in one and blue in another—are the most valuable. Chrome tourmaline gems ...
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On the trail of the Paraiba tourmaline: In search of one of the world's rarest gemstonestanzanite and Paraiba tourmalines are the noted few, but the scarcity, vibrant colour and ever-increasing demand for the Paraiba has caused its value to rise incredibly quickly. The tourmaline’s ...
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