Red, Silver, Gold and Platinum levels. The symbol was later stamped on coins minted in gold and silver. Also minted are bullion (including gold, silver and platinum) and commemorative coins. Some returned with bags of gold and silver. IUDs that contain gold or silver also exist. These offerings include hundreds of pieces of jewelry made of gold and silver. Craftsmen embroidered items with gold and silver thread. The wealthy owned gold and silver pipes. They were also said to be in possession of vast treasures of gold and silver. The color of sparks is limited to red/orange, yellow/gold and white/silver. It is offered in silver, gold, and space grey colors. The Hongxi Emperor improved finances by canceling requisitions for lumber, gold, and silver. The Minoans created elaborate metalwork with imported gold and copper. Armenian mines produce copper, zinc, gold, and lead. Kyrgyzstan has significant deposits of metals including gold and rare-earth metals.