Arabescato's bold, flowing veins are formed by concentrated bands of clay minerals, graphite, and iron oxides that were present in the original limestone. During metamorphism in the Apuan Alps, these impurities were not dispersed evenly — they were folded and stretched by tectonic forces into sweeping, ribbon-like patterns. The word 'arabescato' means 'arabesque' in Italian, referring to the ornamental flowing lines that resemble Arabic decorative art. The grey tones come from graphite, the warmer brown and gold tones from iron compounds, and the green-grey tones (in varieties like Arabescato Corchia) from chlorite — a magnesium-iron silicate mineral.