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.