Darker stones can look so beautiful on certain types of earrings. If the earrings in question are gold earrings, then darker stones almost always work with this type. Take the 14K. Solid Gold Lever Back Earring W/Nr. Diamonds & Sapphire for example. These earrings are top notch for showing off the sapphire in them with a perfect blend of gold mixed right in. September birthdays are going to love these earrings in particular because of the fact that Sapphire is the stone associated with this month. You will find that this is a nice way to make a nod towards the fact that you know when someone's birthday is.