Diamond necklaces are a beautiful necklace around your neck. Diamond is the hardest gem in the world and shines at its best. Before such a necklace with a diamond pendant shines so beautifully, the diamond must first be expertly cut. A diamond can only be cut with another diamond and this technique requires years of training. All in all a costly process: everything for the most beautiful diamond chains. It's not for nothing that diamonds are a girl's best friend.