Pietra Gray Marble

Pietra Gray Marble With stunning dark background and distinctive veins throughout its surface, has become one of the most popular and best-selling marbles in the international market. This stone is one of the types of sedimentary rocks that have carbonate material. In other words, most of this rock is composed of the mineral calcite (calcium carbonate). The predominant dark color in this stone is due to the presence of organic and carbonaceous by-products.

But one of the salient features of this stone is the presence of fractures that are usually filled with white materials such as calcite or secondary quartz. These veins have given unbeatable beauty to the marble.

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Description

Applications

Different kinds of processing have different applications. For instance, polished and honed are applied in flooring, interior walls and steps of the buildings. Architects use leather bush hammered, and tumbled dark gray marble as yard paving and decorative elements in façade of the buildings. Cubic marble are applied as sidewalks paving. Constructors usually use windshield and guillotine dark gray marble as decorative stones in building exterior design.

Polished gray marble is not normally used in building façades since it loses color under the sunlight.

Features

  • Dark background
  • Pretty low water absorption
  • High abrasion power
  • High density
  • Cannot be used in exterior façade of the buildings due to being decolored under the sun, also it is not resistant to climate changes due to its nature.

Factors Affecting Marble Price

  • Solid color and being deep black or gray
  • The less fossils and grains there are in the stone, the higher price it will have
  • The Quality of slabs processing
  • Dimension of the slabs: the thicker and larger the slab is, the higher it will be priced

Chemical and Physical Analysis

Standard Parameters Porosity Water Absorption Pressure Resistance Special Weight Abrasion Resistance
MIN Petty 0.30 500 2.50 2.50
MAX 2.50 1.50 1500 2.80 6
Pietra Gray Marble 0.44 0.42 1266 2.77 2.80

 

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