Question

How could you test if the rock in the ring is a real diamond?

Answer 1

There are many ways! Since a diamond is the hardest rock the only way it would scratch itself is if it was being scratched by another diamond. So you can try to scratch it with another material and if it scratches it isn’t a diamond

Answer 2

To tell if your diamond is real, place the stone in front of your mouth and, like a mirror, fog it up with your breath. If the diamond stays fogged for a few seconds, then it's probably a fake. A real diamond won't fog up easily since the condensation doesn't stick to the surface.

Step-by-step explanation:

Hope this helps!