A diamond is a girl’s best friend! Here are some of the simple solutions or the methods that will enable you to find out the difference between the fake vs. real diamond. The first method is to check the diamond with the help of diamond tester as it will help you to differentiate between real diamond and best fake diamond. It is an electronic tester that can check all the diamonds except the moissanite stone for which the diamond tester is not reliable. The best fake diamond is the cubic zirconia and the weight of this diamond is around 50% more than a real diamond of the same size and shape. Hold the stone or the diamond and blow some air from your mouth on to the stone, if the fog appears on the stone and stays there for next few seconds then it shows that the stone is a best fake diamond because in case of a real diamond, the heat disappears instantly. The real diamond projects blue color light if put under the ultra violet light or the black color.