The term LEAD-GLANCE is composed of two words, GALENA and LEAD. GALENA is a mineral composed of LEAD sulfide, which is the primary ore of LEAD. It has a metallic luster and is gray in color. LEAD is a soft, malleable metal that is used in many industries, including construction, plumbing, and electronics. LEAD is also toxic and can cause health problems if ingested or inhaled. Together, these two words represent the properties of LEAD and its uses.