出典:Wiktionary
出典:『Wiktionary』 (2025/05/26 15:50 UTC 版)
pleochroism (countable and uncountable, plural pleochroisms)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/01 07:48 UTC 版)
Pleochroism is an optical phenomenon in which mineral grains within a rock appear to be different colors when observed at different angles under a polarizing petrographic microscope.