If you want to buy real topaz, you need to choose a reputable merchant or brand, and pay attention to observe the quality and source of topaz. Authentic topaz can be bought in many places, including jewelry stores, crystal stores, online stores and second-hand markets.
Because natural topaz is scarce and expensive, there are few genuine topaz sold in online stores and second-hand markets, so it is best to buy it in large professional jewelry stores or physical stores that specialize in selling natural topaz.