precious stone

Japanese: precious stone(英語表記)preciousstone
precious stone

...Therefore, even if artificial crystals, or synthetic gemstones, are created that have exactly the same components, crystals, and properties as natural gemstones, their value will be much lower than that of natural stones because artificial reproduction is possible.
[Gemstone Classification]
Gemstones are further divided into two categories: precious stones, which are highly valued as treasures or jewelry, and semi-precious stones, which are less valued. In some cases, ornamental stones, which are used for decorative purposes or as ornamental stones, are added, and the category is divided into three categories.

*Some of the terminology that mentions "precious stone" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…それゆえ,天然宝石と成分,結晶や諸特性がまったく同じ人工結晶,つまり合成宝石がつくられても,その価値は人為的な再現性が可能なため,天然石よりもはるかに低い評価となる。
[宝石の分類]
 宝石はさらに財宝としてもしくは宝飾として高く評価される貴石precious stoneと,それらよりも評価の低い半貴石semi‐precious stoneとに二大別される。場合によっては,着用するという用途からは離れるが,置石(鑑賞石)あるいは装飾目的に用いられる飾石(かざりいし)ornamental stoneを加えて,三つに分類されることもある。…

※「precious stone」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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