The lustre of silk is so rich and so beautiful that in Arab countries it is often used in carpets. A 100% silk is not suitable at all, except when you go barefoot, or with stockinged feet.
The lustre can also be closely matched by using viscose- (bamboo, eucalyptus) filament yarn.
The less twine on the thread, the shinier the yarn is.
For the tufted quality of the Caro by Casalis, I used an Italian yarn, especially developed for the production of men suits. It is composed of 25% silk and 75% Merino Wool.
Tufting is a technique whereby a tufting needle and a tufting gun are used to prick or shoot yarn through a cloth by means of compressed air. At the back of the cloth a loop pile is formed that can be cut as well.
The pile always has to be fixed to the fabric, because you would otherwise be able to just pull the thread out again. Fixation is usually done with latex.
In robot-tufting the tufting process with the gun and the compressed air, is computer operated. The advantage is the regularity, and the possibility to vary the height of the pile during the tufting.