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.
Does CZ pass diamond tester?
diamond and Moissanite. Cubic zirconia is rated at 8.5. In fact, some high-quality cubic zirconia can also pass some of these tests (such as the scratch tests) but generally cannot pass all of them. Tip: Although some diamonds look flawless from far away, they all have at least a few small imperfections.