What gives gemstones colors ... The presence of iron and titanium can give tourmaline shades of blue and green, while manganese can produce pink, red, and sometimes brown colors.
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On the trail of the Paraiba tourmaline: In search of one of the world's rarest gemstonesThe tourmaline’s name is ... washed-out blue-green colour and usually have fewer inclusions.” The discovery of a new gemstone excites jewellers around the world, and in the past 10 years ...
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