Stone



The stone or rock is a solid material composed by the aggregation of differents minerals that crystallized into a solid formation. There are different kinds of stones with obviously different physical features, because of the process that formed them.

The stones are classified into three general categories: Igneous or volcanic, sedimentary and metamorphic. And into these three categories befall all the other kind of stone, for example: gabbro, sandstone, obsidian, coal, claystone, etc.

The stones, as I said before, have different characteristics that comes with the process that formed them. For example, the sedimentary rocks have great colour variety, are usually composed of different pieces pressed together and also can contain fossils; the volcanic rocks are denser that any other type of rocks, its appearance can be glassy and can also be light enough to float; the metamorphic rocks are usually made of differents mineral crystals or only one, rarely has any pores or openings and can be too heavy to lift and troublesome to transport.

Finally, the stone is used in construction because of it's durability, it can be modelled with relative ease and can be used as soon as it's extracted from its quarry for a construction

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