How to distinguish between marble and granite?

Difference between marble and granite

Building decoration, decorative use of finishing stones are mainly marble and granite. Marble is mainly used for indoor, granite is mainly used for outdoor, are high-level finishing materials. With marble and granite for indoor and outdoor decoration effect, durability, but the cost is high, and therefore more for public **** building and decorative grade requirements of high engineering. But in recent years, with the improvement of living standards, people's aesthetic concepts of their own living environment is also constantly updated, marble and granite are also more and more appear in the home decoration and renovation.

Stone is mainly divided into two categories of man-made and natural, here mainly introduces the natural marble and natural granite.

Natural marble is the original rock in the earth's crust through the crust of the metamorphic rock formed by high temperature and high pressure. It is a medium hard stone, mainly composed of calcite, limestone, serpentine and dolomite. Its main component is dominated by calcium carbonate, accounting for more than 50%. Others are magnesium carbonate, calcium oxide, manganese oxide and silica. As marble generally contains impurities, and calcium carbonate in the atmosphere by carbon dioxide, carbide, water vapor, but also easy to weathering and dissolution, and the surface quickly lose luster. So a few, such as alabaster, aiye green and other pure, impurities less stable and durable varieties can be used for outdoor, other varieties should not be used for outdoor, generally only used for indoor decorative surface.

Natural marble can be made of high-level decorative engineering panels for hotels, exhibition halls, theaters, shopping malls, libraries, airports, stations, and other public **** construction projects within the indoor walls, to the surface, railings, floors, sill plates, service counters, elevator door face of the finish, etc., is the ideal indoor high-level decorative materials. In addition can also be used for the production of marble murals, handicrafts, household goods and so on.

Natural granite is an igneous rock, also known as acidic crystalline abyssal rock, is the most widely distributed in the igneous rock is a rock, belongs to the hard stone, composed of feldspar, quartz and mica, and its composition to silicon dioxide is dominated by, accounting for about 65% to 75%. Rock hard and dense, according to the size of its crystalline particles can be divided into "pegmatite", "coarse crystal" and "fine crystal" three.

The quality of granite is determined by the mineral composition and structure. Good quality granite, fine and uniform crystalline particles, less mica content and more quartz, and does not contain pyrite. Granite is not easy to weathering deterioration, the appearance of the color can be maintained for more than a century, so more for the wall foundation and exterior wall finishes. Because of the high hardness of granite, wear-resistant, so it is also commonly used in high-level building decoration projects, such as the lobby floor.

Because granite is harder and more acid-resistant than marble, it is more suitable for outdoor balconies, courtyards, dining room floors and window sills in home decoration. And marble can be used for bar, cooking table, dining cabinet countertops.

1, granite material: granite stone is no colored stripes, most only colored spots, there are also solid colors. The finer the mineral particles, the better, indicating that the structure is tight and strong.

2, marble plate: marble material mineral composition is simple, easy to process, most of the texture is fine, mirror effect is better. The disadvantage is that the texture is softer than granite, hard and heavy objects are prone to damage, light-colored stone is easy to be contaminated. Paving marble try to choose a single color, choose the countertop with striped fabric effect is better. Other selection methods can refer to the selection of granite.