Metals of antiquity metal. While widely known during antiquity, these metals are by no means common. Yet all were known and available in tangible quantities in ancient times. Each of the metals was associated with one of the seven then-known celestial bodies, and one of the seven days of the week. Metals of antiquity The metals of antiquity are the seven metals which humans had identified and found use for in prehistoric times: gold, silver, copper, tin, lead, iron, and mercury. These seven are the metals from which the modern world was forged; until the discovery of arsenic in the 13th century, these
Metals Service Center Institute Metals Service Center Institute The Metals Service Center Institute (MSCI) is a trade association and nonprofit organization based in Rolling Meadows, Illinois, in the United States. It was established as the American Horseshoe and Heavy Hardware Association in 1909 and was subsequently known as the American Steel Warehouse Association, then the Steel Service Center Institute. The organization's members are primarily metal service centers that inventory and distribute metals for industrial customers and perform first-stage processing. MSCI has approximately 400 members operating from 1,500 locations primarily in North America. MSCI members purchase about 75 million tons of steel, aluminum and other