ˈbȯrˌnīt, usu -īd.+V noun
( -s )
Etymology: German bornit, from Ignaz von Born died 1791 Austrian mineralogist + German -it -ite
: a valuable brittle metallic-looking sulfide of copper and iron Cu 5 FeS 4 usually brownish on fresh fracture (hardness 3, specific gravity 4.9-5.4) — called also erubescite, horseflesh ore, purple copper ore
• born·it·ic (ˈ)bȯr|nid.ik adjective