What does realgar mean?
A bright red to orange-red arsenic sulfide mineral, As4S4, often occurring in a crystalline form. It is highly toxic and has been used historically as an ore of arsenic.
Example
"The geologist carefully collected a sample of realgar from the mine, taking care to avoid inhaling its toxic fumes."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.