Because of this tourmaline's rarity, its per-carat price is also likely to rival the price of fine sapphire. Color One of tourmaline’s most sought-after and generally available colors is the pink/red ...
The intense green of this chrome tourmaline from Tanzania resembles the color of emerald. Tourmalines come in a wide variety of exciting colors. In fact, tourmaline has one of the widest color ranges ...
Heat and irradiation treatments can also enhance or alter the colors of topaz, making it one of the most versatile and widely treated gemstones on the market. Tourmaline is one of the most ...
In September a cushion-shaped 5.44-carat Paraiba tourmaline ring flew past its US$60,000 upper estimate in auction at Bonhams New York to sell for US$533,900. This is bidding territory more ...
The history of this rare stone is documented in Paraiba: The Legacy of a Color, written by Kevin Ferreira, a gemologist and specialist in this specific tourmaline through his family's involvement ...
Tourmaline ranges in color from black or white to vibrant shades of red, green, and blue. The color of the best Maine tourmalines rival tourmaline from world-famous localities in California, Brazil, ...
Tourmaline ranges in color from black or white to vibrant shades of red, green, and blue. The color of the best Maine tourmalines rival tourmaline from world-famous localities in California, Brazil, ...
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