TaAs single crystals have shiny facets, which can be divided into three groups: the two truncated surfaces are {001}, the trapezoid or isosceles triangular surfaces are {101}, and the rectangular ones {112}. TaAs belongs to point group 4mm, the equivalent {101} and {112} planes should form a ditetragonal appearance. The observed morphology can be vary of degenerated cases of the ideal form. Beside the initial discovery of TaAs as Weyl semimetal, many other materials such as Co 2 TiGe, MoTe 2, WTe 2, LaAlGe and PrAlGe have been identified to exhibit Weyl semimetallic behavior.