Primary mineral - fig-shaped mineral

Japanese: 一次鉱物 - いちじこうぶつ（英語表記）primary mineral
Primary mineral - fig-shaped mineral
These minerals are formed during the formation of parent rocks or parent mineral deposits, and are already present in the rocks or mineral deposits when they are formed [Teall: 1888]. In practice, it is often difficult to distinguish between primary minerals and secondary minerals.

Source: Asakura Publishing Dictionary of Petrology Information

Japanese:
原岩または原鉱床の形成作用によって生成し，岩石または鉱床が生成された時に，すでにその中に含まれていた鉱物［Teall : 1888］．実際にはどこまでが一次鉱物で，どこからが二次鉱物か区別ができない場合が多い．

出典　朝倉書店岩石学辞典について　情報

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