What is the sapphire technique for hair transplantation? It is a tool made of precious sapphire stone used during the opening of channels in hair transplantation, which is the most important stage of hair transplantation. It is used as a supportive tool for the technique of hair transplantation. The tool contains several sharp heads of different sizes to suit the shape of the follicle, which is different from one person to another. It gives the natural shape of the forces In which the extracted follicles are implanted.