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Top two could be gonipora(flower pot)?
Third pic could be a scoli?
Fourth looks like Kenya tree?
The gonipora are VERY diffacult to keep long term I believe?
Acan is right! I remember that one now and I believe Gonipora sounds right for the first two. As for the last one though I'm still not entirely sure what it is.
First two pics, are flowerpots. Third is an Acan, and the last is a Colt Coral!
Flowerpots are tough to keep, but the other two are pretty easy. Good luck! ?