"C" clamp
I the crystal is shaped like a banana then it's ions of the internal structure are shaped like an apple. And vise versa.
vise
It is called a jaw.
A workpiece is an unfinished part that is to be shaped some way. And unless you want to hold it in your hands, it has to be clamped, or attached by something like a vise or a chuck before it can be cut or shaped.
rise, vise, wise
Vice Vise Vase Vote Void
* vase * very * vise * vole
Vise president of finance.
vary, very, vise, vice, void, view
A vise tightens things.
vise
Most likley white with black interior, or vise-versa.