Recognising valuable Persian rugs

Antique Persian rug with workshop signature

#Provenance and workshop signature

Knot back with workshop cartouche and signature

The most important factor is origin. A workshop with established reputation (Habibian in Nain, Seyrafian in Isfahan, Davari in Isfahan, Salahi in Qum, certain Tabriz workshops) automatically lifts a rug into a different price bracket, often with a two- to threefold market value difference compared with an unsigned piece from the same region.

The signature is usually knotted into a cartouche on the upper or lower border edge, in Arabic or Persian script. With major workshops it covers the family name, sometimes the date or a workshop number.

Caution: signatures are forged. A workshop cartouche on its own is not proof. It must be backed up by stylistic analysis, knot structure and dyeing. Established dealers and auction houses know the characteristic knotting traits of each workshop, against which authenticity is verified.

#Knot structure and symmetry

Detail of a strictly symmetrical border construction

High-quality Persian rugs show exceptionally even knot work. The knots sit in straight lines both horizontally and vertically, without deviation. With a mediocre piece the knots in the rows are slightly offset, individual knots larger or smaller than their neighbours.

Knot density is a second marker, but not on its own. 700,000 knots per square metre in mediocre wool with chemical dyeing are worth less than 350,000 knots in cork wool with natural dyeing. Density must be assessed together with material and dye.

The symmetry of the border is a further indicator. With a workshop piece the border runs round exactly, with identical corner constructions and clean transitions between main and side borders. With village rugs or tribal work, creative solutions are often visible here, charming but valuing differently.

#Wool quality as substance value

Detail of cork wool with characteristic lanolin shine

Cork wool from the high mountain regions of Persia (Khorasan, Kerman, parts of Azerbaijan) is the upper category. The fibre comes from the lowest layer of the fleece, is particularly fine, long and rich in lanolin. Cork wool rugs feel like silk, glow softly in the light and age particularly well.

For assessment: press firmly into the pile with your thumb and pull away. Cork wool springs back fully at once. Mediocre wool stays flat for several seconds, very poor wool keeps the impression permanently.

Also important: shine. Unwashed cork wool looks matt, washed cork wool shows a calm, almost silver glow in raking light. If the shine looks hard and glittering, often already strongly mirror-like, that is mostly an indication of chemical wash or synthetic material.

#Condition and repairs

A valuable rug does not have to be flawless. But it must be intact in its substance. Original fringes, original edges, complete pile without holes or worn-through spots, no mildew, no moth residue.

Repairs are not necessarily value-reducing, but they must be recognisable and clean. A professional repair knotter can re-knot fringes, reweave edges, close small holes. The result often looks flawless from the front but is clearly identifiable from the back.

Hidden repairs or overpainting are a warning sign. If a rug looks suspiciously perfect for its assumed age, a magnifier check of the back is worthwhile. An experienced dealer recognises hidden interventions immediately and should disclose them.

Most important point: a good dealer documents all restorations in writing at purchase. Without this documentation the risk rises clearly.

#Provenance and workshop signature

#Knot structure and symmetry

#Wool quality as substance value

#Condition and repairs

Keep reading

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Knot density explained