labs are backed upPappy. History repeats. He'd been surveying for eight years. He hadn't found a single diamond. Superior had abandoned the diamond business. Dia Met's stock was trading at pennies a share. But based upon a few samples, Fipke estimated a diamond concentration at Lac de Gras of more than 60 carats per 100 tons — with about a quarter of the stones of good quality or better. (In kimberlite pipes that have gem-quality stones in commercial quantities,