What Brad said except the last one looks more like Sedum Nussbaumerianum. In more sun it would turn bright orange. Mine used to be orange but I can't give it enough sun and it's turning green again :(

The first one is probably E. Perle von Nurnberg (E. gibbiflora metallica looks quite similar). It has kind of 'powder' (farina) on the leaves that will rub off if touched - they are pretty with it on so try not to handle the leaves (hard to never touch them!)

Definitely looks like your plants would like more sunlight, if you can expose them to more make sure you do it gradually to avoid scorching. I wonder if the mix they are potted in is little too wet?

Thanks for the input! How can you tell if they're not getting enough sunlight? I have them on a small table by a sunny window on a screened in back porch that faces south. I suppose I could put them outside during the day but it's been very rainy lately so I didn't want them to be too wet. I water them about once a week, sometimes I wait longer if they haven't dried out completely in that time.

And I definitely think you're right about the first one. When I first bought it it seemed to have soft and powdery leaves and you can probably see some of my fingerprints in the picture! I'll try not to touch them as much.

They seem to be etoliated - stretched, looking for light. You can see that central stem grows tall and the leaves are spaced farther apart than they should. Rosettes of these plants should be quite compact.

I just took a snapshots of couple of echeverias (one on top is Perle von Nurnberg, I think your first plant could be same):

These are outdoors and get lots of natural light. Indoors, even by the
sunny window, the intensity of light is less. That doesn't mean they
won't grow...but could stretch more or less - depending on light they get.

We all leave some marks on the leaves of plants with farina, it marks and rubs off easily but try not to touch them much.

Keeping plants out of excessive rain is very good idea. If they are in well draining medium, there is even less chance of over-watering (I keep succulents in a mix of perlite, grit and turface; only very few have some small % of bark or coir or soil).

Rina

Okay thanks! I did notice that the first plant I have pictured has grown quite tall since I've had it. I thought that it may just have been because the florist that I bought it from said she had only watered it once in the four months she'd been at the store. I'll try putting them outside for a little while on sunny days.

It stretched from not enough light, not from not enough water - I am sure you know that now.

I forgot to mention (edit: I did mention that, sorry for duplication...) that plants shouldn't be exposed to much stronger sunlight suddenly, but acclimatized gradually - otherwise they will burn. You did mention that they have been outdoors so maybe that's not your case, maybe just keep them from strongest sun (usually around noon); and it depends where you live too.

I'll keep that in mind. I currently live in upstate New York so it's not a super harsh climate in the summer but it's probably better to be safe than sorry. I've only had succulents for a few months so I'm still learning but I absolutely love them! Thanks for the advice!

i think the top could be dusty rose-colour and leaf shape match, but as paracelsus said-who knows?

My 2 cents on IDs:

Echeveria 'Perle von Nurnberg'

Echeveria 'Dondo'

Echeveria multicaulis

Sedum adolphi (nussbaumerianum is now included in this species)

Hey Rosemarie! I have lots of multicaulis and was initially skeptical of that ID. However, although my plants have lots of color right now and are just about done blooming, a comparison of leaf form to plant three above is identical. Good call as always!

Brad

2nd pic- looks to me like my plant hybrid echeveria deren-oliver.

3rd plant looks like my plant labeled cremnophila non-variegated form.

Hey Brad! I should've mentioned that it would be in your best interest, Lillykatea, to wait till all of these flower to get a positive ID on them. Yes, Brad, my E. multicaulis is colored up too. Neil, if you're thinking of Cremnophila linguifolia, I believe the leaves are much thicker & rounder. On the 2nd pic, E. 'Deren-Oliver' is more flat & should have a slight red rim to the leaf edges. Like I said, flowers will help out with IDs.

Thanks everyone! I have set my succulents outside for a couple hours on sunny days and the leaves have started to turn red around the edges on the second and fourth plants. I am concerned for the second succulent, however, because its lower leaves have started to turn yellow in one section. Is it common for the leaves to do this or could there be another problem?

Yes, color changes during leaf resorption are normal as long as they are in the lowest leaves of the rosette. That plant has lots of leaves, and a change to brighter conditions could lead to an increased rate of leaf recycling. Just watch and don't give it more water than normal unless the soil is dry top to bottom.

The other cause would be be rot blocking water transport through the stem, but I doubt that is the issue here.

Brad