gemologist
An expert in gemology.
To cluster incorrectly.
(geology) an unstructured geological deposit composed of boulders, clay, gravel, sand, and silt that is transported by glacial drift.
(biology) A simple organism, not compound or composite.
宝石鑑定士はルーペでサファイアを慎重に調べ、その産地を特定した。
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