Costco offers members an opportunity to purchase one-ounce gold bars in the store, online or via their app. The retailer offers gold bullion bars, 1-ounce bars and coins in different designs.

The widow of a Toronto man robbed of his gold chain and killed during her birthday celebration three years ago says she's lived with guilt ever since.

You can even purchase gold at Costco and other big retailers — but should you? Find out how to add gold to your portfolio ...