If you have an antique decanter at home, you should be mighty proud as not many people own a truly unique vintage piece of glassware. You might have gotten it handed down from generation to generation, or maybe left in a will by one of your passed away relatives, or you might have bought it at one of the antique shop that you came across in your wandering abroad. But how do you know that the piece you have at home, or you’re holding in your hands, is truly the genuine antique glassware?