Marble is known as a metamorphic rock which forms when Limestone is exposed to an immense amount of heat and pressure (this process is called metamorphism). Whilst under pressure the Limestone is exposed to Calcite and other materials such as graphite and clay. Due to the pressures and heat, the Limestone and other materials begin to crystallise.
Marble stone is thought to be a strong, hard stone. Which is why many of us tend to see marble used in certain areas on the house (Bathrooms, interior walls and even in fireplace surrounds). Since one of the key materials that make up marble is Calcite, the natural stone has a Mohs Hardness rating of 3, this means that although the natural stone is strong and viable to use in and around the property, it is not advised to use the material within areas with sharp objects (such as in a kitchen).
Marble can be found all around the world and isn’t exclusive to specific areas. Saying this though, currently, 4 countries are responsible for half of the world’s marble production. These countries are:
The most famous marble used for things such as sculptures tends to be from Carrara, Italy. The marble from Carrara was used to create sculptures from artists such as Canova, Michelangelo and Donatello.
Due to the production of marble creating large deposits of the natural stone, the mining process can be scaled up. This makes marble an economical resource to mine. Because marble is so economical, there are multiple uses for the natural stone in our everyday lives. Things such as railroad beds, roads and the foundations of building all use crushed marble.
Other uses of white marble is to ground up the natural stone into a fine powder. This powder is then used as a brightener or can be used to neutralise acids, be used as a pill filler, and can be used to remediate acidic damage in soil and water.
How is Grey or Black Marble Formed?
When looking to incorporate marble into our interior design we often have the choice of white marble, grey marble or even black marble. Grey marble and black marble contain very similar properties to white marble. All forms of marble (Black, Grey and White) register at a 3 on the Mohs Hardness Scale which means that in terms of using either black marble or grey marble, both variations provide your home with the same amount of utility as white marble.
Black and grey marble are created in roughly the same process as white marble, however, certain impurities within certain materials such as clay, sand or iron cause the marble’s colour to alter during the metamorphic process. This results in marble coming in a variety of different colours.
Hope that you find this information useful. If you would like to enquire about marble or any other form of natural stone then feel free to contact us via our online form or call us on 01604 585848