n. - A mineral, called also sphalerite, and by miners mock lead,
false galena, and black-jack. It is a zinc sulphide, but often contains
some iron. Its color is usually yellow, brown, or black, and its luster
resinous.
n. - A general term for some minerals, chiefly metallic
sulphides which have a somewhat brilliant but nonmetallic luster.
n. - A mineral, called also sphalerite, and by miners mock lead,
false galena, and black-jack. It is a zinc sulphide, but often contains
some iron. Its color is usually yellow, brown, or black, and its luster
resinous.
n. - A general term for some minerals, chiefly metallic
sulphides which have a somewhat brilliant but nonmetallic luster.