Diamond simulants are materials that resemble diamonds in appearance but are not made of the same carbon structure. Common examples include cubic zirconia and moissanite, which are often used in jewelry as more affordable alternatives to natural diamonds. These simulants can mimic the sparkle and clarity of real diamonds, making them popular choices for engagement rings and other decorative pieces. While diamond simulants can look similar to genuine diamonds, they differ in terms of hardness, brilliance, and price. For instance, moissanite is known for its higher refractive index, giving it more fire than a diamond. Understanding these differences can help consumers make informed choices when purchasing gemstones.