3 Easy Tests to Identify Real Black Diamonds (Carbonado) at Home

Hello and welcome. If you own a black stone and wonder whether it's a real black diamond, also called carbonato, you don't always need expensive lab tests to get some quick answers. While professional certification is the most reliable method, here are three simple ways you can try at home. For one, scratch tests on glass black diamonds are one of the hardest natural substances on earth. A real black diamond can easily scratch glass or ceramics without being Take a piece of glass. Firmly scratch the surface with your stone. If it leaves a clean scratch and the stone remains intact, that's a strong sign it could be real. Note, be careful with this test. Some fakes like moissanite may also scratch glass, so don't rely on this method alone. Unlike white diamonds, black diamonds absorb light rather than sparkle with rainbow colors. Hold the stone under strong light. A genuine carbonato won't show the typical fire, rainbow flashes of regular diamonds. Instead, it will reflect light in a metallic or graphite-like way, often with a subtle shine rather than a glittery sparkle. Black diamonds are denser and heavier than many fake stones. Place the stone in your hand and compare it with another gemstone of similar size. The black diamond should feel heavier. If you have a small scale, you can check its carat to size ratio. Black diamonds usually seem smaller for their weight. Final tip. While these tests can help you at home, the most reliable confirmation is through a professional gemologist or certification lab like GIA. That way, you'll be sure whether your stone is a genuine black diamond.