999 Gold & 1 oz SILVER China 4 Coin Unicorn Proof Set (w/Box & COA) for sale. You will receive the exact set shown in the pictures with the Box and COA and Booklet. The set contains three. 999 Fine Gold Coins. Their total gold content is 0.40 oz of Gold. Plus one 1 oz Fine Silver Coin. Mintage of only 2500 sets so a rare set. This stunning unicorn set is a rare find. One of the more popular and heavily collected modern Chinese coins is the Unicorn. This is a short series with many low mintage coins. Contains 0.4 oz of. 999 fine Gold and 1 oz of. Individual coins come in capsules along with a box and a certificate of authenticity. Obverse: Features an Eastern Unicorn. Reverse: Features a Western Unicorn. Guaranteed by the People’s Bank of China. Please note that we test all precious metals we sell with a Precious Metals Verifier as well as verify weight before listing. Feel free to reach out with questions or for more information.