Human: How can I tell the difference between a real diamond and a fake one? Assistant: 
A real diamond is usually cut in a way that makes it sparkle. It will also have a distinctive color, which may be yellow or brown. A fake diamond will not necessarily have these characteristics. You can check for other signs of fakery such as uneven edges, inclusions, and an unnaturally bright glow. If you are unsure about the authenticity of a diamond, consult a professional jeweler who can help you make an informed decision.