Fall 2008
Color Variations and Properties of Johachidolite from Myanmar
Karen M. Chadwick and Christopher M. Breeding
To learn more about the rare gem material johachidolite, the authors used various analytical techniques to study 15 faceted samples from Myanmar that showed a range of colors: saturated orange, orange, yellow, desaturated yellow, and desaturated green. Both orange/yellow-hued and green samples showed trends for beryllium and the radioactive/radiogenic elements uranium, thorium, and lead. Orange/yellow samples also showed relatively constant rare-earth element (REE) concentrations, but the green samples had higher REE values, especially for the lighter elements.
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