Infinite series of icosahedra : Ratio 1 / F
Three yellow diagonals in the smallest red icosahedron constitute three edges of a triangle of the middle blue icosahedron. Analogously three yellow diagonals in the middle blue icosahedron constitute the edges of a triangle of the largest brown icosahedron. The three yellow diagonals in the largest icosahedron constitute the edges of a triangle of an imaginable even larger icosahedron.
Edge and diagonal in an icosahedron are in the ratio of 1 / F.
Such a series can continue in infinity.