Diamond cut
（重定向自Rose cut）
![](/Images/godic/202502/08/Brillanten2556.jpg")
![Diagram of old diamond cuts showing their evolution from the most primitive (point cut) to the most advanced pre-Tolkowsky cut (old European). The rose cut is omitted, but it could be considered intermediate between the old single and Mazarin cuts.](/Images/godic/202502/08/Diamond_cut_history2556.png")
![Fancy cuts](/Images/godic/202502/08/Fancy_cut_diamonds2557.jpg")
![](/Images/godic/202502/08/Diamond_facets.svg2557.png")
A diamond cut is a style or design guide used when shaping a diamond for polishing such as the brilliant cut. Cut does not refer to shape (pear, oval), but the symmetry, proportioning and polish of a diamond. The cut of a diamond greatly affects a diamond's brilliance; this means if it is cut poorly, it will be less luminous.