1. gemology; gemmology
Wikipedia definition
2. GemologyGemology or gemmology is the science dealing with natural and artificial gems and gemstones. It is considered a geoscience and a branch of mineralogy. Some jewelers are academically trained gemologists and are qualified to identify and evaluate gems.
Read “Gemology” on English Wikipedia
Read “宝石学” on Japanese Wikipedia
Read “Gemology” on DBpedia


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