Stone

Stones are any material with a high consistence that can be found in the nature.
 * What are stones?**

There are many kinds of stones that varied in they mineral composition, colour, texture, permeability and grain size; however there are three main types: -Igneous rocks. Rocks that are formed by the cooling and solidification of molten rock -Sedimentary rocks. Rocks that are formed by the compaction of sediments ir by the crystallization of the dissolved minerals//. // -Metamorphyc rocks. Rocks that are changed into a different ane by great heat or pressure.
 * How many kinds of stones do you know?**

One of the main characteristics of stones is that are the most durable of building materials
 * What characteristics do stone have?**

Stones are used in construction because:
 * Why are stones used in construction?**
 * It's great permanence and doesn't need a lot repair
 * They are soundproof
 * Allows a great inside temperture
 * It is a good protection against the summer heat

**Stone** is a very useful material in Architecture, but the use of this material has advantages and disadvantages. The advantages of stones are that it is durable, it adapts to the sculptural treatment and it can be used naturally. The disadvantages are that stones are difficult to quarry, transport and cut; they are also weak in tension, they are expensive and unstable with loads pushing at angles. There are ways to work stone in a form that it can be more useful in the constructions. The first is the rubble that consists in broken stones, of irregular size, shape and texture. The second way to work it is ashlar masonry that basically is smooth square or rectangular stones laid with mortar in horizontal courses. //**Stone masonry does not depend on strong bonding for stability where it supports only direct downward loads.**// //**The best stone bonding is that in which blocks are placed so that the vertical joints in one course are not about the joints in the course above and below.** // //**Even when stone has been replaced by cheaper and more efficient manufactured products, it is still widely used as a surface veneer for its practical and expressive qualities.** // []
 * Stone paragraph:**