Online Jewelry Repair Diplomas: Learn the hands-on skills involved in designing, crafting and repairing rings, earrings, pins, bracelets and necklaces out of all kinds out of jewels, stones and metals. We'll teach you the basics of metallurgy and essential jewelry crafting techniques, including finishing and polishing stones, cutting and joining metals, casting, soldering, molding, engraving, enameling, embossing, plating and more.