Discovering various minerals and apparent similarity of some kind of stones after gem cutting makes several difficulties at evaluating of the gem stones. This is while , improving of science and technology in context of growing those crystals that is totally similar to the natural minerals and create various methods of treatment natural gem raise these problems. In this regard , Argo company with using the modern knowledge, presents the some types of gemology tools with the highest quality. We can detect all kinds of natural gems from imitation or artificial once. Working with this stuffs are so easily. You can learn working with this devices at Argo’s courses and be mastered at it.