Looks like Sedum adolphii. It likes full sun so give it as much light as possible, but wean it into the sun or it will burn - just like me! The leaves will turn a reddish brown in sunlight, which is normal. They will also turn a little brown and get soft from too much water, which is a warning sign.

To expand on what socks said - it looks like vermiculite on the top of the soil. This will break down and lead to rot. I agree that repotting is a good idea. =)

...and in a smaller pot too. Half the diameter of the current one at best.

Gill

Thank you all so much, I've popped her into a smaller pot, higher up and will be on the search for suitable succulent potting soil within the next week. The rocks are gone, and the soil at the bottom of the pot was pretty damp despite the fact that I haven't yet watered her, I was planning on watering her today so good thing I was able to check out that bottom soil. Thank you all :)

Good for you! It must even look happier! Just watch it with the water, and make sure it gets plenty of light. We see those two problems over and over with succulents.

Did you plant it in pure vermiculite or is that only a top dressing?

I'm not sure, I didn't plant it. I received it as is in the photos above from a coworker when they left a few days ago, it had lived exactly as it is on her desk prior.

I repotted it into a smaller pot as per above comments, but I unfortunately had no choice but to repot with the same soil it came with as I don't yet have any substitutes. It does have the same consistency throughout however, so whatever it is is mixed through not simply a top dressing.

Looking happier already I think :) thank you all so much, I have some leftover soil from the repotting if anyone thinks she needs to be a little higher.

Going to source that new soil asap, there's actually a local succulent show happening this weekend so I'll be on the lookout for some good draining premixed succulent soil there. I've never had a succulent before and funny that I came into this one by accident, because I'm already hooked!

Hopefully you'll find good potting mix at the show. Maybe you can post a photo of it before potting plant in - just in case...maybe we may have some suggestions (sometimes, mix could be still improved).

You may end up with few new plants too :)