It is a block from the Atlantis BOM. This is the Sea flower block, month 4 I think. it was the one that looks the most like a wreath block. all the straight edges are actually folded fabric so right now there are "pockets" they fold back to create the curves.
I did different colours slightly but I like it. I also threw in the rest of the fabrics that I had from the center so if you need something it is there. or at least something to match to.