GEMVOL iOS App is a Special guide for people who is going to buy colored, stones, diamond jewelries.
The guide introduces the weight unit of diamonds, colored stones, and the precious metals , and also gives a basic grading scales of diamond, and colored stones color, clarity and cut quality. It also gives you a short description of some famous diamond jewellery sellers.
its also includes preferred and recommended suppliers
No long time reading and you can then keep your confidence before shopping.