Refractive index info12/29/2022 ![]() ![]() ![]() The specific gravity varies from 1.05 to 1.09. Glass and chalcedony also have a similar refractive index to amber. The cause of color of these blue and green gems is believed to be from fluorescence of UV and violet light from natural sunlight.ĭelocalized electrons on organic molecules are the cause of the other colors.Īmber has a refractive index of ~1.54 and is singly refractive.Ĭopal and some plastics are in the same range of amber gemstones. Under UV light these blue gems give a strong cobalt blue fluorescence. This blue (or green) color is only seen in reflected light, in transmitted light it will show a more common amber color (such as yellow, orange, red). ![]() Blue amber in reflected and transmitted lightĪmber occurs in the colors white, yellow, orange, red, brown, blue, black, green and has a typical resinous luster.īlue and green amber is found only in the Dominican Republic. ![]()
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