the bone collector

so we went onto site, to see the foundations being started. they dug the whole and started to work on the shuttering for the concrete. then we noticed a bone! that was found whilst digging the whole for the foundations. we assumed it was a human bone because it fit perfectly on Roberto's arm. maybe its his ancestor![can someone tell us if it is or isn't?] now, that isn't the strange thing. the strange thing is that the builders used it to mix the concrete!! as they say.....only in Inida.