13 febrero 2015
Diamonds come in all colors with price tags to match — ice-white, blue and pink attract high prices and stones with brown hues the least. But now that brown diamonds can be heat-treated to remove the darker color to produce near-perfect colorless gemstones, can consumers tell the difference?
http://feeds.sciencedaily.com/~r/sciencedaily/~3/M_-NAO4A1s8/150213104636.htm
