Not sure don't have a scale. I had found it doing some prospecting in SD deadwood with my garret in . Had a lot of impurities it was alot of learning how to break it down and smelt it the right way. It's about 3" wide 31\4 long buy an inch thick. But trying to make a good deep square form out of wet sand to pore it in is well. You know lol it was a pretty good nugget.