Iron Block

I found a block of metal on the sidewalk. I thought it was a piece of iron, but I was not sure. I did a Google search and found that the density of iron was 7.874 g/mL. After tracing the metal onto a piece of paper, I did a calculation and weighed the metal to find the density. It turned out a little more than the exact number, about 8.082 g/mL. The iron block is iron.