"Gemstone is a mineral from the group of rocks and metals that have a value of beauty as well as the resale value for humans. Since the first was also the gemstone is a symbol that shows social status, integral expression, as well as wealth. This app shows you how to recognize the different types of gemstones. Many of the tips contained in this application. Immediately download this application. The types of precious gem stones of which are emerald, diamond, ruby, and sapphire. Some of the type