noun
Meaning 1
An aluminium nesosilicate mineral, Al2SiO5, which can be cut into a gem and displays strong pleochroism, shifting between red, green, and yellow.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: chemistry, geography, geology, mineralogy, natural-sciences, physical-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided