Encyclopedia
Marble
Marble is a hard limestone rock, homogeneous and fine-grained, often crystalline, matte or translucent. Marble is usually colored in various hues depending on the presence of mineral impurities (colored banded marble, Eastern alabaster, etc.), but purely white varieties are also known.
Source: "Explanations to the Goods Nomenclature of the Harmonized System for Foreign Economic Activity of the Russian Federation (HSN Russia)" (prepared by the Federal Customs Service of Russia) (volume 1, sections I - VI, groups 1 - 29)