Pure Silver Proof Coin Canada: Heart, Key. Original condition encapsulated with certificate authenticity & case/box. The item "2018 Celebration Love $3 Pure Silver Proof Coin Canada Heart Key Crystals" is in sale since Tuesday, January 2, 2018. This item is in the category "Coins & Paper Money\Bullion\Silver\Coins". The seller is "mario95coin" and is located in Ontario.This item can be shipped worldwide.