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  PreciousGemstone

Sigma KEE - PreciousGemstone

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珍貴的寶石
PreciousGemstone is the class of Minerals and fossilized substances that have great monetary value.
Relationships      
Parents 寶石 Gemstone is the subclass of Mineral items that are especially valued for use in jewelry and other decorative items, and also in some mechanical and industrial applications.


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