Structural features of gem minerals and identification and evaluation
Mei An 1
Shaanxi International Trade College, Xianyang, China
Zhengjingyi Vocational Technical School, Foshan, China
Northwest University, Xi’an, China
Autor do korespondencji
Mei An   

Shaanxi International Trade College
Mining Science 2019;26:109-122
Gem has long been chased because of its cultural and historical significance and beauty, and the identification and evaluation of its structural features have also been paid attention to. Plum blossom jade and emerald were identified and analyzed by means of the conventional detection method, infrared spectroscopy and X-ray powder diffraction analysis. The results showed that plum blossom jade with black and brown background and red, white and brown amygdaloid body spots had a diameter of 1-10 mm, a relative density of 2.69-2.75 g/cm3 and a refractive index of 1.52-1.55, and its minerals contained water molecules, quartz, low albite, anorthoclase and andesite. It was observed that emerald was green, greasy, glassy, transparent, with a relative density of 2.66-2.78 g/cm3 and 1.58 refractive index, and its minerals contained water molecules; there were two kinds of arrangement in crystal channels. The main mineral component of emerald was beryl, and its purity was high.
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