Artisan Paperclip 18k Gold Filled over Stainless Steel, 4mm width. High-Quality Materials: This gold chains for jewelry making on spool are made of 304 stainless steel, it's very strong and durable, vacuum gold-plating process in the furnace can make makes it far less likely to tarnish or turn skin colors. Lobster clasps jump rings are all made of 304 stainless steel, the cute charms are made from zinc alloy, bright in color, safe to the skin.