Excavated dodecahedron – work in progress

I started thinking about other ways I could use the coiling and joining technique I used for my tortoise, and it occurred to me that the tortoise shell was essentially half an irregular stellated polyhedron.

A polyhedron is a 3D shape with flat faces, eg a pyramid. In a stellated polyhedron, the faces, rather than being flat, are extended to form new polyhedra – like a pointy star.

So I thought I would try to make a dodecahedron (12 faces – each face is a regular pentagon). The individual elements making up the tortoise shell were a mixture of hexagons and pentagons, so I already knew how to do this shape.

But instead of making a stellated dodecahedron, where the faces point outwards, I thought I would try a concave or excavated dodecahdron, where the faces dip inwards.

Whether it’s stellated or excavated, the individual units are made in exactly the same way – it’s just that the inside is the “right” side for an excavated dodecahedron, while the outside is the right side for a stellated dodecahedron.

I used the same yarn and pattern as for the tortoise shell, as I had quite a lot of yarn! But I had a brief moment of panic when I discovered that the retailer who supplied the copper wire I used for the core was no longer stocking it! However, I round an online supplier, so all was well.

The first sample units I made were quite deep, with steeply sloping sides. But when I joined two together, I concluded that they were probably too deep. To create a dodecahedron, the units have to fold back against each other , and if they are too deep they may not be able to do this.

dodecahedron sample

So I made the units shallower.

excavated dodecahedron 6 units

Then I joined five units together around a central unit.

excavated dodecahedron 6 units joined

Then I joined the sides to create half a dodecahedron.

half an excavated dodecahedron

Now I just need to make the other half and join them together!


Published by


Flextiles uses shibori, ecoprinting and felting to create original, one-off upcycled pieces. Extending the life of a garment by an extra nine months reduces its environmental impact by 20-30%.

3 thoughts on “Excavated dodecahedron – work in progress”

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.