Stone

About stones Mineral hard and compact substance of natural origin characterized by a high consistency. The stones served to produce the first tools.
 * **What are stones?[[image:stone0.jpg width="281" height="231" align="left"]]**

Six (6), Cuarcitas Granitos Mármoles ónices Slates and Travertinos.
 * **How many kinds of stone do you know? **

Resistant material, alloys of natural elements of several colors, they are in the nature and are used in the construction
 * **What characteristics do stones have? **

Because they are resistant, beautiful and adaptable to the needs
 * **Why are stones used in construction? **

In my opinion... Stone has been in use from the beginning of the humanity. It has been used in all the times as a tool of work and a material of construction. It is a natural and very useful element for the man; forms a part of the evolution of architecture. It takes big advantages as his durability; thanks to it, the constructions can last thousands of years (yet remains of buildings of ancient, Egyptian cities and Greeks constructed with stones); his adaptability, in agreement to the geographical situation and epoch was used in sculptures, architecture, as structure and as ornament. And it is used naturally in any human activity. His disadvantage is the difficulty to transport it and to cut her but for the age of stone this did not represent a major problem; the stones were in use for doing tombs and systems of irrigation. At present the stone presents other disadvantages, his cost and his instability to be able to construct buildings with angles. Nowadays the stone has been ground to be able to build with his force but to be the best worked; this is achieved by the process of the stone in stonework where they extract profit to the disadvantages. They extract the stones of the nature, cut in blocks and the tailing crush them to be able to offer to us all the benefits that the stone has from the first times and till now.