![]() In some specimens, there’s so much copper that inclusions of native copper-almost pure metal-highlight the gem’s interior. Paraíba tourmaline is unusual because, although copper colors some other gems-notably turquoise-it’s not a coloring agent in any other tourmaline. But researchers believe that its crystals form under very unusual conditions, with large amounts of trace elements like manganese and copper, which causes its color. Like many other Brazilian elbaites, Paraíba tourmaline forms in pegmatite. The gem is an elbaite tourmaline that comes from one area of Paraíba state in Brazil’s northeast corner. Photo: Katharina Mint Ring © 2011 Fabergé Ltd. This magnificent stone weighs 45.31 carats and boasts natural, untreated color. Their prices are much lower than the prices for fine green tourmaline or brighter bluish green tourmaline.įashioned Tourmaline can be found in large sizes. Dealers frequently describe these gems as “oily” or “olive” green. Gems cut this way might show a less attractive brownish or yellowish color through the crown. ![]() Cutters typically fashion these stones with the table parallel to the length of the crystal. Some absorb light so intensely that they appear almost black from certain directions. And, while tourmaline can’t match tsavorite’s luster or brilliance, it’s far less expensive than a tsavorite of equivalent size and quality.ĭark-toned stones-which are more common in the marketplace-aren’t very attractive. Both these gems are rare in sizes above two carats, but it’s not hard to find chrome tourmaline in sizes up to five carats. Chrome tourmaline can be a lower-priced alternative to tsavorite or emerald. Stones that show attractive colors in both directions-such as bright green in one and blue in another-are the most valuable.Ĭhrome tourmaline gems offer hues that are more saturated than most green tourmalines. Most green tourmalines are strongly pleochroic. At their best, green tourmalines are transparent, brilliant, and clean, with attractive bluish green hues. ![]() Green tourmaline’s pastel hues provide the market with pleasing alternatives to the deep, rich hue of emerald and the softer green of peridot. ![]() This 8.16-carat cushion-shaped rubellite and 10.78-carat emerald cut pink tourmaline are superb examples. Tourmaline's hue and depth of color can approach the range of ruby and pink sapphire. Applied Jewelry Professional ™ Online Diploma ![]()
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