arsenopyrite
/ˌɑːrsənoʊˈpaɪraɪt/
noun
- A silver-white to gray mineral that is a compound of arsenic, iron, and sulfur, and is a major source of arsenic.
- The sample of arsenopyrite had a metallic luster and a slightly brassy color.
- Miners often encounter arsenopyrite in gold-bearing veins.
- Arsenopyrite can release toxic fumes when heated, so it must be handled carefully.