To ensure that you are buying a real, unheated and untreated Diopside, always ask the seller to provide a gem certificate along with the gemstone. The gem certificate issued by a trusted, authentic gem lab contains all the relevant information and serves as a reliable proof of authenticity. It also provides details about the color, weight, size, and treatment indications of the gemstone.
Choosing a trustworthy retailer is another good way to get surety about the quality and authenticity of the Diopside gemstone you are purchasing. An established brand is always conscious of their reputation. Therefore, they will never use any malpractices that can spoil their brand value in the industry. If you are looking for a chrome diopside or other varieties of diopside, you can find multiple options at GemPundit.