Stone

they are pieces of rocks quarried and worked into a specific size and shape for a particular purpose.
 * What are stones?**

Granite, limestone, sandstone, marble, soapstone and alabaster.
 * How many kinds of stone do you know?**

they are hard substances, formed of mineral matter, of which rocks consist. Also they´re hardness and heavy matirials.
 * What characteristics do stones have?**

**Why are stones used in construction?** Beacause  its hardness, durability and easy way to get them.

Stones have been used since the stone age until these days, however their uses have varied because there are a wider range of materials which offer a better solution for structures. Some of the advantages of stone are its durability, adaptability to sculptural treatment and the fact that it can be easily found in nature. In the past, stones were used in many different ways; at times, rubble (roughly cut stones bonded with mortar) was convenient for its simplicity and cheap cost. Some other times, ashlar masonry was used to give a monumental value to a building. Nowadays, stone is not used to construct big structures because it is not as easy to transport as other materials, it requires a lot of effort to cut and quarry from nature, plus, stone structures do not resist tension or loads pushing at angles, so it's not as resistant to use for construction. Other materials provide better stability to a building. Some of the materials which have replaced stones as a construction material are aluminum, wood, concrete, reinforced concrete, steel and plastic, but even though stone is no longer used for structural means, it still has some other uses in the constructing area such as surface veneer, sculpture treatment and texturing on walls.

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