Copper Nugget
Written by Boss Tambang Wednesday, 02 December 2009 00:03
Copper is found in native form in many places, but it’s no longer an important source of the metal. Today copper comes from huge low-grade deposits, mined by large companies that can turn a very small profit but make up for it in volume. The impurities in copper, including silver and gold, are important byproducts. This copper nugget (shown about four times life size) comes from a streambed in some place like Minnesota or Michigan, which was a copper district for many years. There the metal appears in extremely old rocks of the Canadian Shield. It’s soft enough to bend in your hands. Copper was not as useful for the ancients as the alloy bronze, which is much more durable. Today copper is one of the most important metals, used in electrical equipment, alloys, coatings, and computer chips. Because native copper corrodes fairly quickly at surface conditions, nuggets like this don’t last long. For truly long-lasting nuggets, you want gold.
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