Jewelers know that a tourmaline of this color is sometimes called a Brazilian sapphire
There is an 
additional blue variety known as 'moroxite', but this is ... Amblygonite, andalusite, 
brazilianite, precious beryl, sphene, topaz and tourmaline can all be... [DOC] [TLE] Emerald Value, Price, And Jewelry Information [PAR] Everything you ever wanted to know about emerald.