Laguiole stone handle like turquoise stone is highly symbolic handle material, the Egyptians used this precious ornamental stone on ceremonial amulets and necklaces. It is also the national stone of Tibet for its virtues of good health and prosperity.
The natural turquoise of a sleeve size is very rare and would be almost unusable because porous and fragile. By nature, semi-precious stones are porous and therefore difficult to work and cut in jewelry.
This is the reason why it is stabilized. It is a real natural turquoise with impregnation of a colorless resin to increase the hardness of the gem without modifying either the structure or the color.