Trellum
Yes these little plants are super easy to grow indoors and outdoors, they're quite forgiving and will put up with quite alot, but they really don't like, too much TLC

in fact caring for and propagating them is almost identical to your Mesembryanthemums that we identified a while back.
As you can imagine, there are as usual many, many varieties of Sedum Pachyphyllums all with differing bluish tones to their leaves and some even having red tips, and as you haven't seen one in flower, thought you might enjoy seeing what yours would look like in flower.
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Zigs - yes, the Latin name is good isn't, but can't honestly be 100% sure, that it means 'thick leaved' though.

But have to say great fun could be had with these little Sedums, as many of them have some very funny names, like Sedum Rubrotinctum is commonly known as ' the pork and beans' plant

try picturing that one