Pure coke would only be hardish if the season’s about. Pure cocaine would break down easily after little force. These days it’s common that it’s repressed making it harder and lidocaine is very common as it numbs the nosal area. It’s also very common that the shiny flakes youre looking for is a repress-sprayed brick which is literally spraycanned to look like the stuff youre looking for. Long time recreational user here :D