Playing with icosahedrons

[Eric]

When you link and stack icosahedrons, it gives interesting, and above all scalable, structures.
Here are 2 rings of 5 icosahedrons.
But it would also work with rings of 6 (to get a 6-pointed star).
And you can stack as many rings as your geomag collection allows.

[Eric]

Closer view

Pentagonal pyramids on the outer side of the ring tucked in.

Pentagonal pyramids on the outer side of the ring tucked in.

[Eric]

Pentagonal pyramids inside the ring tucked in.

Pentagonal pyramids inside the ring tucked in.