Persian Tabriz rugs are graded in units known as Raj. This Persian Tabriz Carpet is a 50 Raj (i.e. 50 rows of knots per Raj, which is the equivilent of 7cm). So, this Tabriz Carpet has circa 340 knots per square inch. This fine Persian Tabriz Carpet has an especially elaborate design inspired by the tile work of the dome this is known as the "Gonbad" design. The 3 weavers have skilfully executed the pattern. This Tabriz Carpet has a wool pile with sections of silk highlights. The silk elements divide the tile motifs as well as providing areas of silk tracery within the tile motifs. The pile is hand knotted onto a cotton foundation, the knotting is extremely fine, neat and consistent.