Abstract: A stud for use in a mining pick is disclosed which has a tip consisting of a polycrystalline diamond composite and a body having a carrying surface on which the tip is mounted, the carrying surface being inclined to the axis of the body by an angle of between 45.degree. and 65.degree.. In an embodiment of the invention, the stud is received within a pocket and the head of a mining pick, the axis of the pocket in the head axis of the mining pick being substantially coincident, and the mining pick having a shank adapted to be received within the box of a mining machine. The stud may be provided with side extensions adjacent to the composite to protect the material of the mining pick body.