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3DMagnetic icosahedron.
Ed builds strange shapes out of magnets some times. Of course it's mathematically interesting to see what shapes can be built this way, and a hollow icosahedron is pretty impressive! This one is made out of high-strength neodymium-iron-boron magnets.
Source: Force Field
Contributor: Ed Pegg Jr
Acquired: 8 April, 2004
Price: Donated
Size: 2.5"
Purity: <35%