Construction Ĭonstruction marble is a stone which is composed of calcite, dolomite or serpentine that is capable of taking a polish.
Also, the low index of refraction of calcite allows light to penetrate 12.7 to 38 millimeters into the stone before being scattered out, resulting in the characteristic waxy look which brings a lifelike luster to marble sculptures of any kind, which is why many sculptors preferred and still prefer marble for sculpting. This preference has to do with its softness, which made it easier to carve, relative isotropy and homogeneity, and a relative resistance to shattering. White marble has been prized for its use in sculptures since classical times. Statue of Abraham Lincoln (Lincoln Memorial) made from Georgia Marble in 1920 Sculpture Poiana Ruscă Mountains, Caraș-Severin County These various impurities have been mobilized and recrystallized by the intense pressure and heat of the metamorphism.Įxamples of historically notable marble varieties and locations: Green coloration is often due to serpentine resulting from originally magnesium-rich limestone or dolomite with silica impurities. The characteristic swirls and veins of many colored marble varieties are usually due to various mineral impurities such as clay, silt, sand, iron oxides, or chert which were originally present as grains or layers in the limestone. Pure white marble is the result of metamorphism of a very pure ( silicate-poor) limestone or dolomite protolith. Primary sedimentary textures and structures of the original carbonate rock ( protolith) have typically been modified or destroyed. The resulting marble rock is typically composed of an interlocking mosaic of carbonate crystals. Metamorphism causes variable recrystallization of the original carbonate mineral grains. Marble is a rock resulting from metamorphism of sedimentary carbonate rocks, most commonly limestone or dolomite rock. This stem is also the ancestor of the English word "marmoreal", meaning "marble-like." While the English term "marble" resembles the French marbre, most other European languages (with words like "marmoreal") more closely resemble the original Ancient Greek. Folded and weathered marble at General Carrera Lake, Chile
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