<human>: Is there a way I can tell if a diamond is fake?
<bot>: Yes, there are several ways to check if a diamond is real or fake. One of the most common methods is to use an instrument called a "diamond tester." Diamond testers are used to measure the refractive index and dispersion characteristics of diamonds, which can help determine whether it's a real diamond. Additionally, you can also look at the clarity grade on the diamond, as well as its cut and carat weight, to make sure that it's not a synthetic stone.