Walnut wood

Walnut can form a carved surface, an inlay element or the structural body beneath decoration. These uses must be recorded separately: a box with walnut veneer need not have a walnut carcase. Colour varies with growth, cut, finish and ageing. A brown surface cannot identify walnut reliably, much less establish a tree's region or an Iranian maker. Ask whether the material description comes from a maker, a collection catalogue or an analytical examination.

Seasoning reduces moisture before work but does not stop later movement. Wood responds differently along and across its grain. A thin decorative layer bonded across a thicker support can develop stress when their movement differs. Inspect lid fit, mitred corners, warping and opened seams without forcing the object closed. Tight geometry is a useful workmanship observation; it is not proof of a historical date or hand manufacture.

Relief carving removes surrounding wood to leave forms standing proud. Khatam combines small elements into patterned sheets attached to a support; the visible geometry does not reveal every underlying timber. Paint, varnish and later refinishing can hide grain or soften tool marks. Request photographs of an undecorated edge and the underside as well as the front. Do not scratch a finish, lift an inlay strip or remove hardware to identify a wood species.

Keep wooden objects away from radiators, direct sunlight and persistently damp walls. Support the whole base rather than a projecting handle or loose lid. Loose fragments, new insect debris and lifting decoration warrant isolation or professional advice, not household oil or insecticide. For a purchase, record dimensions, maker attribution, repairs and replacements. A claimed Shiraz or Isfahan origin requires evidence independent of a familiar decorative pattern.