In fact, this is easier when it comes to diamond ring genre since it is really easy to create gemstone that exactly replicates a natural diamond under professional surveillance using appropriate machines and equipment.
It will be hard for even a gemologist to identify whether such a stone is a real one or fake by just looking at it. They probably will have to go through a series of tests in order to determine its genuineness. However, you can avoid these confusions by purchasing a diamond ring that is certified by credible organizations such as GIA and AGS.
Now, you may be wondering how can you tell if a diamond ring is real, especially if you got it as a gift or as a family heirloom. In these scenarios, it is not necessary that your diamond comes with an authenticity certificate. Hence, it is better to do some at-home tests in order to determine the authenticity of the diamond. One of the easiest options is the fog test, while other simple ones include the water test, newspaper test, dot test, etc. You can also seek the help of a professional if required.