three fold symmetry Three fold symmetry
Vegetable: Trifolium repens Vegetable: Trifolium repens
Animal: canine incisor Animal: Canine incisor
Mineral: Tetrahedrite crystal Mineral: Tetrahedrite crystal
four fold symmetry Animal: Anisoptera
Four fold symmetry Animal: Anisoptera
Mineral: Andalusite Vegetable: Cornaceae
Mineral: Andalusite Vegetable: Cornaceae