For sale Canada Confederation Centennial silver & gold coin set. SUPERB BLUE RAINBOW PATINA ON SILVER COINS!! 4 coins are silver minted from 800 silver. Silver Coins, 1 Gold Coin. Weight - 18.2733g - 90% Gold , or 0.5287 Troy Oz.SUPERB BLUE RAINBOW PATINA ON SILVER COINS. The item "1967 Canada Confederation $20 Dollars Gold & Silver Coin set Proof Superb patina" is in sale since Wednesday, May 19, 2021. This item is in the category "Coins & Paper Money\Coins\ Canada\Proof/Prooflike Sets". The seller is "rokas" and is located in Calgary, Alberta. This item can be shipped worldwide.