Just a very wild guess: xPachyveria clavata or Pachyphytum 'Blue Haze'

Whatever it is, looks like leaves are shrivelling? And soil looks very peaty (from whatever I can see in photo) - it would help if there was no peat (or just very little), and lots of sifted perlite or pumice. It would make better draining potting mix

That is a very etiolated Echeveria, my guess is Echeveria ‘Perle Von Nurnberg’’.

There’s a few way you can go about this, but this is what I would do.

1. I would first give it a good drink, give it a few hrs of the earliest morning sun and afternoon shade.

2. Wait about a 7-10 days and then repot in a better mix like Rina suggested with your other succulent. Remove as much of the old soil off the roots before putting in new mix.

3. Then I would slowly acclimate to stronger light and water once the mix is dry.

4. After about two months the Echeveria should have nice compact top growth because it has been getting more sun, I would behead it right under the rosette.

Put the cutting aside in the shade till it forms a nice callus, this should take no more than a week for that sized stem. You can leave the cutting out of mix till roots form or pot it up, but no water till roots. Keep the rootless cutting out of strong sunlight, without roots the little guy could potentially fry. Once roots grow you can begin to water and slowly acclimate to it’s sunny spot.

5. This is optional, but once you cut the top rosette off you can keep the lower stem attached to its roots. Treat it like a normal succulent and it’ll become your Echeveria baby machine.