Copper is also called "red gold" because of its color and, in part, its value. It is the second best conductor of electricity after silver, followed by gold, all three in the same group 11.[43] In the physical sense of the term, it is one of the noble metals. Copper is a metal found naturally in the environment, in rocks, soil, water, and air. In nature, it is generally found associated with sulfur. Today we are offering a beautiful large natural specimen for auction Copper Nuggets United States 593 grams 115 x 93 x 29 mm about Natural, Untreated Standard shipping (2-7 days for Italy) (10-20 days for Europe) (15-40 days for rest of the world) please be careful with the description and measures