Moroccan Rug Quality — How to Evaluate What You're Looking At

Density is measured in KPSI (knots per square inch). Standard Beni Ourain: 70–100 KPSI. Beni Mrirt high density: 130–180 KPSI. Master-grade Beni Mrirt: 200+ KPSI. Persian Tabriz and Kashan top out at 300–800 KPSI for comparison; Moroccan rugs trade some density for the longer pile and looser hand that defines the tradition.

Knot type: symmetric (Ghiordes / Turkish) vs asymmetric (Senneh / Persian). Most Moroccan traditions use symmetric variants or single-warp modifications. The choice is regional — neither is intrinsically 'better'; both produce durable rugs. Symmetric is slightly more robust; asymmetric allows finer detail.

Row alignment matters more than absolute density. A 90 KPSI rug with perfectly straight, parallel knot rows is higher quality than a 110 KPSI rug with wandering rows. Row alignment indicates weaver skill; a master weaver maintains straight rows throughout a months-long weaving.

Natural dyes vs synthetic dyes is the second-most-discussed quality variable after wool. Natural dyes — madder for reds, indigo for blues, walnut for browns, henna for oranges — produce colours that age into specific patinas over decades. The colours are 'living' in the sense that they shift subtly with time and light exposure.

Synthetic dyes produce colours not achievable naturally — brilliant fuchsia, electric turquoise, pure black. They are uniform and fade more flatly than natural dyes. They are not intrinsically lower quality — many recognised contemporary weavers use selective synthetics for specific colours — but they age less characterfully.

Mordant chemistry matters as much as the dye itself. Alum, iron, copper, and tin mordants each produce different colour outcomes and different lightfastness profiles. Traditional Moroccan dyeing uses iron and copper mordants that stabilise natural dyes against fading. Poor mordanting causes colours to bleed or fade rapidly even on otherwise well-made rugs.

Foundation quality: the warp and weft threads that form the rug's skeleton. Wool warps (used in traditional Atlas weaving) produce a softer, more flexible rug. Cotton warps (occasional in Beni Mrirt) produce a flatter, more structurally rigid rug. Both can be high quality; the choice affects feel.

Pile depth and consistency: the pile should be consistent across the field with no thinning patches (except where intentionally designed). Pile depth on Beni Ourain typically 2.5–4 cm; Beni Mrirt 1.5–2.5 cm; flat-weave kilims are essentially zero pile.

Selvedge and fringe: tight, even selvedges (the side edges) indicate careful finishing. Loose or fraying selvedges are repairable but signal either rushed work or storage damage. Fringes should be even in length and structurally continuous with the warp.

Back-of-rug appearance: visible knots, clean weft lines, and disciplined work throughout. A back showing crowded or messy work where the weaver lost discipline (often in long weavings) indicates lower quality even if the pile side looks fine.