What are the different types of Natural Stone?


What are the different types of Natural Stone?

The common stone types that are used today are identified in four categories:
Sedimentary, Metamorphic, Igneous and synthetic stone.

I. Sedimentary stone is from the natural elements like the glaciers, rivers, wind, oceans, and plants. Small sedimentary particles brake off form these elements and accumulated to form rock beds. They were then bonded together over millions of years of heat and pressure.

II. Metamorphic stones comes from one stone binding to another via time, heat, pressure, and other minerals. The change may be a development of a crystalline formation, a texture alteration or color change.

III. Igneous stone is formed from volcanic magma. Beneath the Earth’s surface, liquid magma cools and solidifies. The mineral gases and liquids penetrate into the surrounding stone and creates new crystalline formations of varying colors.

IV. Quartz stones are a composite material made from crushed stone that have been bound together in an adhesive, ( commonly a polymer resin with some contemporary types using a cement mix). The two most common types of stones used in producing these products are marble and quartz.


Basalt is an igneous rock, basically solidified magma . Some Basalts are compact; some have small holes caused by volcanic gas bubbles. Basalt is usually dark in colour.


Granite is an igneous rock composed of quartz, feldspar and mica. It is molten rock that has solidified under pressure. Depending on the mineral content present, it will range in colour from black to brown, pink, green, off-white. A very hard material, it is excellent for worktops.


Limestone consists mainly of calcium carbonate that was formed on the bottom of shallow lakes and seas, deposited as loose particles of shells or formed chemically by the action of acidic water containing carbon dioxide. This slightly dissolves the calcium carbonate that is already present, which then reforms by binding onto particles of sand or shell. Over time these beds build up, are duplicated, and become further compacted by the weight and/or pressure caused by movement of the earth¹s crust. Minerals, often oxides of iron, help to decide the various colours of stone available in all shades of white, black, grey, buff and yellow.


Marble is a metamorphic rock composed mainly of calcite or dolomite crystals. The crystal-like texture is the result of limestone being changed by heat and pressure. Marbles range in colour from white to black, with many varieties of yellow, red, green or beige in between.


Sandstone differs because it is predominantly made up of particles of quartz that have been eroded from other rocks, often granite. These are carried away down streams and rivers until they are eventually deposited. Occasionally they are formed by winds carrying them, like the shifting sands of a desert. Natural cement minerals occur in the ground water and help to glue the particles together. As with limestone, time and the weight of other material on top compacts the sand to form stone.


Slate is a fine-grained metamorphic rock formed when sedimentary rock, typically shale, is subjected to great pressure. Slate can be split into thin layers. The minerals within the rock re-orientate themselves to be at right angles to the source of the pressure, and so do the planes of easy cleavage. Most slate comes in shades of grey.


Travertine is a form of limestone deposited by mineral springs, especially hot springs. It is a hard but holey material (used to build the Colosseum in Rome) and usually exists in a palette of whites, creams and tan.


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