The rug should be in good condition (neither worn
out, nor shabby). A well-restored rug is acceptable.
The purpose intended for your rugs not to be neglected.
A rug the destination of which is the dining room or
the entrance hall will favour strength and solidity. Aesthetics
(iconography) or refinement will be of lesser importance
in this particular case where special attention will be
granted to the wool quality of its tufts. The layman may
be at a loss to determine the appropriate material to be
privileged. However, if the role imparted to your carpet
resorts essentially to decoration or collection, weaving
and aesthetic considerations will be of prime importance.
A rug at least 30 years of age is in itself a warrant
of good workmanship. Modern carpet industry appeared
somewhat later (in Iran -i.e. former Persia - the change
occurred before and after the Revolution).
Some modern carpets are still most carefully manufactured
(excellent wool quality, natural dyes) but here again
the expertise of the specialist will help him in his choice.