Gemological Characters Research of Ruby from Yunnan
云南红宝石的宝石学特征研究
Advance in Research of Gemological Diamond Materials
宝石级金刚石材料研究的进展
The gemological refractometer is characterized by small volume and less weight.
这种宝石折射仪得特点是小巧轻便。
Influence of recrystalized graphite on gemological class diamond monocrystal growth
再结晶石墨对宝石级金刚石单晶生长的影响
Comparative study of the gemological characteristics of nephrite of Hetian jade and Qinghai jade.
和田软玉与青海软玉的宝石学特征对比研究
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