Queens, Ny City Clerk Office

Commonly, with the names "marble and stone," are actually listed four types of ornamental rocks:

1. Marble

The marble is a metamorphic rock composed mostly of calcium carbonate (CaCO3). It is used since antiquity as a material for sculpture and architecture. In this sense the term is used to indicate other stones "transparencies", ie surfaces which can be made shiny by polishing.
Marble is a metamorphic process through sedimentary rocks such as limestone or dolomite, which causes a complete recrystallization of carbonate calcium which are predominantly composed and gives rise to a mosaic of crystals of calcite or dolomite (mineral). L 'combined action of temperature and pressure during processing of the sedimentary rock of marble, leading to progressive obliteration of the original structures and textures in the rock, resulting in the destruction of any fossils, sedimentary layering, or other structure in the original rock.
The color of marble depends on the presence of mineral impurities (clay, silt, sand, iron oxides and chert nodules), present in granules or layers within the original sedimentary rock. During the metamorphic process these impurities are shifted and recrystallised due to the pressure and heat. The white marbles are a result of the metamorphosis of limestone free from impurities.

2. Granite

Granite is an intrusive igneous rock, was then formed as a result of the slow cooling of a magma intruded at depths between 1.5 and 50 km. The process of formation of granite is however still under debate and has generated several hypotheses and classifications of the granite.
Some Egyptian pyramids are built partly of granite: the red pyramid (2600 BC) is named for the red color of the granite surface. The pyramid of Menkaure is instead built from blocks of granite and limestone. The Great Pyramid of Giza has a stately granite sarcophagus. Many Hindu temples in southern India are made of granite, especially those built during the 11th century under the leadership of King Rajaraja Chola I.
Granite is widely used in modern buildings, especially in the floor. Granite is also appreciated in the construction of monuments to its excellent resistance to acids. The clean and polished granite is also used in cooking many cuisines plans for its durability and aesthetics.

3. The Travertine

Travertine is a sedimentary rock limestone chemical, widely used in construction, especially in Rome, since the first millennium BC. The difference between the deposit and the spongy calcareous travertine bench is essentially given by the geological formation of the soil: the limestone deposits is one of the most frequently found in nature, being produced by the precipitation of calcium carbonate dissolved in water.
The color of travertine is dependent on the oxides, which has built-in (which happens quite easily, being by nature a fairly porous stone). The natural color varies from white to walnut milk, through various shades from yellow to red. And frequent meetings fossil footprints of animals and plants. The industrial quality bench
sediment depends crucially on the compactness. In general, however, travertine stone is a strong and docile, floor coverings used by both external and internal, and even, in some cases, to sculpture.
The aesthetic quality is now defined by the architects, having very refined over the past fifty years, the methods of industrial manufacturing, and multiplied the possible treatments.

4. La Pietra

It is still rock, but not polish. You can have both soft rock, rock is compact.
In these materials you can find a color background, and a design that is the predominant one, arising from the structure of matter itself and the presence of mineral inclusions and colorful.
You can see so many types of design:
1. veined (veins when there is more or less thick, color and trend variables);
2. granular (is found in granite and is caused by crystals of different sizes, which are assembled);
3. Ghiandoni (this is typical of granite, and consists of more or less large inclusions in the form of an acorn);
4. breccia (it is typical of many marble, and is the union of fragments of rock cemented together).