Al-Jawhara factory for volcanic blocks (pozzolan) is light in weight, sound and heat insulator in all its sizes and types, which are only found in Madinah. And land is a cycle of all kinds, sizes and colors, and interlocks of all kinds, sizes and colors work with a clear message and vision to contribute to the construction and development of all volcanic products in Medina in particular. And in the Kingdom of Saudi Arabia in general to serve and meet the requirements of customers and the local market, and we were able, thanks to God, quickly to be aware of the possibilities available to become one of the leading factories in this field.