The insight into trade in describing the fine luggage in the countries, precious relations and precious jewels is a book written by Al -Jahez in which he recounts the types of stones and jewelry from their names and how to distinguish between real and false ones; And move from it to clothing and clothes; As mentioned by the countries from which it brought fabrics and jewelry, and what each country was distinguished in its production, it would be issued, and each country was importing it.