acicular bismuth; a sulphide of bismuth, lead, and copper occuring in acicular crystals; - called also aikinite.
See also: Needle
needle ore
needle ore
[′nēd·əl ‚ȯr] (mineralogy) Iron ore of very high metallic luster, found in small quantities, which may be separated into long, slender filaments resembling needles. aikinite