Fall height); Water absorption (Water absorption); Abrasion (Frictional wear test); Density (Bulk density). Color of the stone, or rather op definition of visual sensation caused by the impact on the eye fluxes of electromagnetic radiation in the visible spectrum, it is an important physical property. In general, the color of the rock due to the predominant color giving in its composition of minerals and impurities. He determined by the so-called "average color" when the colors of various rock-forming minerals are merged into one common tone. The color of minerals depends on their chemical composition. Thus, the white marble consists mainly of colorless dolomite and calcite that . Gray tones are determined by the presence of carbonaceous or other organic particles, and pink – salts of manganese or iron oxide, green – chlorite and serpentinite particles, and sometimes copper oxides.
Color igneous rocks deter mined colored minerals: quartz, feldspar and dark color components. Color is a very important sign, turn out equation describing crucial in assessing the decorative stones. Structure Natural stone is characterized by the shape and proportions generated doobrazuyuschih minerals, particularly styami its structure and size. Structures are crystalline (granular and crystalline), porphyry, detrital, Stack Lovato oolitic, etc. Marble (Latin marmor, from Greek.
Marmaros – shiny stone, boulder), crystalline rock formed by the recrystallization of limestone or dolomite. In construction practice "Marble" is called metamorphic rocks of medium hardness, polishing makers, these include: marble, limestone marmorized, dense dolomite, carbonate breccias and calcareous conglomerates. Marble almost always contain impurities other minerals and organic compounds. The composition of impurities can lower or raise the decorative marble and affect its color. Image is determined not only the structure of marble, but also direction in which you are sawing stone. Color and pattern of marble occur only after polishing. Marble from the ancient times used as a structural and architectural cladding material due to its plastic and decorative merits (hardness, fine grain, which makes the marble in the treatment of pliable, able to make polished, through which identifies the tonal richness of marble and the beauty of his homogeneous, speckled, or layered structures). Marble is also used to create the mosaic compositions, relief and round sculptures (mostly monochrome marble, mostly white, at least – a color or black).