noun
idiochromatic color; characteristic color of a pure mineral
Technical term in mineralogy; refers to the inherent color of a mineral due to its chemical composition, as opposed to 他色 (allochromatic color) caused by impurities.
See also: 他色
自色は鉱物そのものの化学成分に由来する色です。
Idiochromatic color is the color derived from the chemical composition of the mineral itself.
この鉱物の自色は緑色で、不純物による他色とは異なります。
The idiochromatic color of this mineral is green, which differs from allochromatic color caused by impurities.