Abstract
Although many chemical analyses of zircons have been made, few spectrographic investigations have been reported. Pereira-Forjaz1 has examined spectrographically a Portuguese zircon, and Wild2 has investigated the arc spectrum of red, brown and blue Siamese zircons. The cause of the color in zircons generally has been attributed to the presence of impurities, particularly iron, copper, titanium, chromium, vanadium, zinc, uranium, thorium, hafnium and magnesium3, 4, 6
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