Agate is a ornamental stone, which is a kind of chalcedony. Description of stone-mineral with striped structure and striped inclusions. The way it looks and distinguishes agate from other minerals. Many mineralogists claim that agate is a semi-precious mineral. It is also believed that this mineral is a precious stone. Gemstone agate or it is a semi-precious stone, there is no consensus. It is commonly called " gemstone». However, many experts still tend to believe that agates are semi-precious stones. They came to this conclusion because of the prevalence of these, from their point of view, semiprecious minerals.