Adromischus cristatus (aka Key Lime Pie plant, sometimes Crinkle-leaf plant)

It may be good idea to make potting 'soil' well draining (looks very organic in your photo); make sure container has drainage hole. Plant will grow aerial roots that are quite common.

You could try propagating healthy leaves, sometimes it works, sometimes doesn't. Also stem cuttings or seeds.

Whoaaaa! That looks suspiciously like a glass container their doesn't it Rina? They're really not a good idea for any type of plant. I bet there's no drainage holes in it either? Lindsay, please tell us what it is growing in? Looks like you need to go shopping for a new pot as well some better mix.

Gill

...that's what I thought too Gill.