<human>: Is there a way to tell if a diamond is real without a diamond grading report?
<bot>: Yes, there are some ways you can tell if a diamond is real. One way is to look at the cut of the diamond. A well-cut diamond should have a symmetrical shape and be free from inclusions. Additionally, diamonds that have been treated with heat or radiation may appear cloudy, which could indicate they’re not genuine. You can also test for fluorescence, which occurs when light hits the diamond and causes it to emit visible light. Finally, you can check the diamond's refractive index, which is its ability to bend light. If the refractive index doesn't match what is expected for a diamond, then it may not be authentic.