White Cliff Minerals has kicked up a swag of uber high-grade copper sniffs, tipping the scales at a record-breaking 64 per cent, giving hints of a large-scale copper discovery at its Rae project in northern Canada. The latest haul follows a suite of extraordinary silver grades the junior explorer recently racked up, reaching as high as an eye-boggling 75,439 grams per tonne, from its nearby Great Bear Lake project.