How do you tell if a diamond is real without damaging it?
The Water Test
Drop the gem into a glass of water. While a fake diamond is often hollow inside, a real diamond is high in density. Therefore, if the suspect stone sinks straight to the bottom of the glass, it is a real diamond.
Is there an app to test diamonds?
New Android App to Detect Authenticity of Diamonds and Precious Stones. … Gem Selections has been the only trusted brand for Government Lab-certified Gemstones, Diamonds, and Jewellery since 1987.
Do diamonds shine or reflect?
The short answer is that they are expertly cut and polished to maximize the diamond’s natural brilliance. … Diamonds get their brilliance from three things: reflection, refraction and dispersion. Reflection is the light that hits the diamond and is immediately bounced back up, giving it an instantaneous shine.