An new opal was found in Ethiopia, Africa in 2008. The quality of rough opals from Ethiopia is very good, but they are easily crushed during the ucture as well as prismatic pattern. Ethiopian opals show relatively low refractive index (RI<1.40) and specific gravity (S.G.<2.0) with respect to other natural opals. Sophisticated techniques including FTIR and XRF were applied to examine the Ethiopian opals. The FTIR spectroscopy is proven to be the best instrument for the identification of natural opals among their simulation such as synthetic opal, plastic and glass. The play of colors of Ethiopian opal is similar to the synthetic opal, showing honeycomb or lizard-skin structure as well as prismatic pattern. Ethiopian opals show relatively low refractive index (RI<1.40) and specific gravity (S.G.<2.0) with respect to other natural opals. Sophisticated techniques including FTIR and XRF were applied to examine the Ethiopian opals. The FTIR spectroscopy is proven to be the best instrument for the identification of natural opals among their simulation such as synthetic opal, plastic and glass.
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