The Platonic Icosahedron has twenty faces which are equilateral triangles. In the Golden Icosahedron, twelve of those triangles (the yellow ones) have been replaced by acute, isosceles triangles with a leg:base ratio which is the Golden Ratio.
To try the software I used to make this, just visit http://www.software3d.com/stella.php.
RobertLovesPi.net 
Pingback: On Icosahedra, and Pyritohedral Symmetry | RobertLovesPi
Pingback: A Survey of Polyhedra with Pyritohedral Symmetry | RobertLovesPi
Pingback: Smith’s Icositetrahedron, and Related Polyhedra | RobertLovesPi
A beauty!
LikeLiked by 1 person
Simple but elegant!
LikeLiked by 1 person
Thank you!
LikeLike
Pingback: Emancipation Day, mAdam/Magnet vs eVolution/Electric – ED/14 by numbers – all in everything "42" for you