Stone

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===The **STONE** is a mineral found everywhere on earth. It’s used architecture as a constructing material or as part of the design of the structure. There are many different types of stones, the 3 more important are: === ====** *Igneous: is formed when the lava cools.** ====

*Sedimentary: is formed by the placement of sedimentary elements,
**and with time these elements are compacted and form the rock.** ***Metamorphic: are formed when another type of rock is exposed to a ** **different temperature and pressure, causing the rock to change and transform.**  === **Stones are used in constructions because of their strong structure and****they can carry a lot of weight.** **Also architects use stones not only as part of the structure, but also for designing** purposes for the reason that it give a sense of greatness to the building. ===

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===Stones are minerals, and can be found all over the world. For centuries stones have been a very popular material for constructions, not only for their durability but also for their adaptability and good looks. In terms of construction we can find different types of stone work. First we have rubbles, which are the cheapest stone work, in this type; the pieces are loosely thrown together in a wall between boards and adhered with mortar. Second, we find Ashlar Masonry; this is the most popular work, because it is regularly cut blocks and it can be used as entablature. Stones, like bricks, resist deformation better than any other bonding material. Ancient civilizations used, almost in every construction, stones to provide a better support to their construction; examples of this are the Greek and Egyptian architecture. They used many columns to maintain the heavy weight of stones. This material has plenty of advantages, here are some of them: it is durable, it can be used naturally and is adaptable to sculptural treatment; the disadvantages are very few but strong, these are: difficulty to quarry, to transport and to cut, it’s expensive and unstable with loads pushing at angles. In conclusion, stone is an extraordinary material to build and it’s long lasting, just with a money investment you can have an enduring and strong building, not only using it as a part of the structural elements, but as a surface veneer. ===