Tin be toxic. Tin in combination with other elements forms a wide variety of useful alloys. Tin is most commonly alloyed with copper. Pewter is 85–99% tin; bearing metal has a high percentage of tin as well. Bronze is mostly copper (12% tin), while addition of phosphorus gives phosphor bronze. Bell metal is also a copper–tin alloy, containing 22% tin. Tin has sometimes been used in coinage; for example, it once formed a single-digit percentage (usually five percent or less) of American and Canadian pennies. Because copper is often the major metal in such coins, sometimes including zinc, these could be
Sundown Tin and Copper Mine 28 July 2000 having satisfied the following criteria. The place is important in demonstrating the evolution or pattern of Queensland's history. The Sundown Mine is of historical importance because of its combination of tin, copper and arsenic production, the primary product at any given time varying with the prevailing market condition. Thus at one site is a microcosm of the forces influencing the pattern of most mining in this region of southern Queensland. The Sundown Mine together with the Beecroft Mine and the Jibbenbar State Arsenic Works, is associated with the prickly pear eradication program. The place demonstrates rare, uncommon