Tin of protons. It has two main allotropes: at room temperature, the stable allotrope is β-tin, a silvery-white, malleable metal, but at low temperatures it transforms into the less dense grey α-tin, which has the diamond cubic structure. Metallic tin does not easily oxidize in air. The first tin alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. After 600 BC, pure metallic tin was produced. Pewter, which is an alloy of 85–90% tin with the remainder commonly consisting of copper, antimony, and lead, was used for flatware from the Bronze
Sundown Tin and Copper Mine though copper fell dramatically in 1907 as well. However, Kershaw and Dodds intended to erect a crushing works at the site the following year. The mine was worked under tribute in 1909 - 1910. In 1911 -1912 work recommenced, with both copper and tin prices resurging. A road was cut to the site, and a shaft sunk in the bottom of the tin mine, which had previously been mined largely by open-cut. The old smelter was described as still being in good condition in 1913, but mining was clearly slow . In 1914 the mine was taken over by the