Note that visibility bands for one of the fcc crystals are drawn (with labeled zones) in yellow, and that one each of the twelve 5-fold zones, and the twenty 3-fold zones, for the icosahedral structure are labeled in magenta. Also note that the 3-fold icosahedral symmetry zones lie at the center of the dark-grey (220) triangles, while the 3-fold fcc-symmetry or [111] zones lie at the corners of the dark-grey triangles. The 4-fold fcc-[100] zones are centered on the sides of these triangles, while the 2-fold fcc-[110] zones are shared between icosahedral 5-fold and fcc 3-fold sites.