Love is like the salt & pepper diamonds - imperfections make them stronger… As the name suggests, salt and pepper diamonds have the greatest number of inclusions and were discovered in 450 BC. Back then, diamonds with better clarity were the only ones in demand. The inclusions of a salt and pepper diamond may vary from being just a few black marks, to completely black; therefore they are not graded very well in terms of one of the 4C's - Clarity.