The sapphire earrings are held in with four prong 14k yellow gold and the post and backs are also 14k yellow gold. The sapphires measure 4 millimeters round and have a dark blue color and have some inclusions in the stone. Each sapphire weighs .32 carats for a total carat weight of .64. The earrings weigh .09 grams. I will provide a nice earring box with them.