Mum bought it thinking it as a succulent but I have no clue what it is.
Pale silvery green leaves, has survived being treated like a succulent so far.

Are the leaves hairy?

Looks like a relative of this plant (if not the same one):



The leaves look really deflated, like there is some serious heat or water stress going on. Are they soft? Is the plant still firmly attached if you tug gently at the base?

What kind of light are you giving the plant? What is the water situation like?

Looks like a young badly stressed Pachyveria.