*Minor imperfections such as spots or scratches may exist in bullion silver bars and coins during the minting or production process. These are common conditions and do NOT affect the valuation of product's buyback price. Pure silver tarnishes when exposed to air. It could change colour to brownish-red, black, or show white spots. The trade-in value of silver bullion items won't be impacted by this. The trade-in value for silver collectibles will be subject to the quote made by Emperio Gold and Silver Coins (HK) Limited.