Standard 1: fire color a real diamond, even in the faint light, still dazzling and dazzing. In order to test the truth of the diamond, you can put it in the sun, look at it to light reflection condition. If you are in a dark room, just a lamp lighting can do the test. As long as the light comes into contact with the diamond, it all aspects of the soon to reflect the light, to make it look fun. This is other all sorts of stones are incomparable. Standard 2: transparency while diamonds look like transparent, but it is not really completely transparent. We can use two methods to compare diamond and zircon. First, the first method is the fog test, is ah a sigh of relief to the stone, and a layer of atomized water vapor condensed on the stone. This layer of mist to stay in the diamond in a very short time, but in zircon will be longer. The second method, you can put the 'diamond' a black dot above, make the black origin is at the bottom of the 'diamond' spire. If the black spots, can see through the stone, so the 'diamond' is actually diamond, zircon. In fact, if it is a real diamond, should be fully integrated into the black spots inside the diamond, will not be transmitted. Standard 3: indeed, the hardness of diamond hardness is very high, it can cut or scratching and other mineral materials such as glass. However, if you want to test your authenticity of diamond jewelry, jewelry for the prevention of injury, should avoid using this method. Usually, the diamonds are not be in addition to other material cut or scratch diamond itself, but the best is always good to protect your diamond jewelry. Anyway, if you have any questions, you can at any time to ask for help. As a recognized professional diamond dealer, authoritative in assessment of diamond.