The earrings are made of 14k white gold. The posts and backs are not threaded. The diamonds measure 4.2 millimeters round and weigh 0.65 carats total weight. The diamonds are not dug out of the earth they are grown or created in a machine over a few weeks. That is the only difference. The diamonds have a G color and an SI1 clarity grading. The diamonds are held in a three prong martini style setting. We will provide a earring box.