Is rubber an inelastic material or elastic material?

Question

and what's one of the most economical and most inelastic or elastic materials (opposite of rubber)

i.e. if rubber is inelastic whats the most economical elastic material

Answer 1

rubber is more like an elastic material.

elastic mean can back to initial shape after it's given a force.

every material have their own elasticity...

Answer 2

A rubber band is also known as an elastic. Guess why?

Most inelastic? Case hardened steel, perhaps. or rock.

Answer 3

Rubber is elastic.

The most inelastic material is Diamond.

Answer 4

This is difficult haven't given an intended use, but harder stone/rocks are practically free and very elastic