宝石の鑑別特性としての屈折率と反射率

概要

論文の詳細を見る
In identifying a gemstone, the refractive index of the stone is one of the important characters. When the refractive index is in the range over the ordinary refractometer, we have to identify the stone by other characters. Since the refractive index is theoretically a function of reflective index, an instrument is designed to measure high refractive index using the value of reflectivity. Measurements on several gemstones with higher refractive index by this instrument showed that we could identify them, provided that stones have the refractive index over 1.81. This instrument will be useful for identifying high refractive gemstones.
宝石学会(日本)の論文
1975-09-15