Field guide No. 518

In a test rig, a sledgehammer sinks into a block of clear crystal, which dents round it like a pillow. The results are in, and they’re fluffy.

Pillow-soft impact in rigid crystal

Hard, until tested.

In a test rig, a sledgehammer sinks into a block of clear crystal, which dents round it like a pillow. The results are in, and they’re fluffy.

Field noteRigid crystal shatters or holds. This block is called rigid and takes a sledgehammer like a pillow.

Specimen
No. 518
Kind
Impossible (the round square kind)
Breaks
Material
Where it doesn’t exist
A materials testing rig.
Nearest existing relative
A quartz block.
Filed in Fresh slop as
Objects

Also impossible, also breaking material