If you plan to buy citrine jewelry, such as a Citrine Ring or earring, always remember three things. Firstly, ensure you buy it from a trusted and reputable manufacturer. Genuine citrine is rare, and most cheap and commercial citrines are heat-treated amethyst or smoky quartzes. You can easily differentiate between heat-treated amethyst and genuine citrine. Heat-treated amethyst has small lines in the crystal, which are not present in the case of natural citrine. The natural citrines have a cloudy or smoky appearance.