That would be on par with some of the largest diamonds in the world if it turns out to be real !! It would be hundreds of carats and worthy of the smithsonian museum !! Values would be in the millions !! The clarity and shape would yeild one of the largest cut diamonds in modern history !! That would really be something if confirmed to be real. You will be a famous man, and it will make world headlines. My fingers are crossed for you caleb !! Congrats !!
If they are real.......try not to drop them from 20 feet up on the concrete any more. That would be a seriously bad thing for value. All that being said......I do have some doubts. But I hope it works out for you because it would be an all time great find and a history changer !!