It's an Iris Niebach design which is available free here.
I have to say that I have a book of Iris Niebach's doilies but personally find her diagrams hard to follow. I tried a couple of times with the doilies, got lost and gave up (Oh no!! Now I've said that, I will have to tackle one next because I can't bear to give up!! I can't be beaten by a pattern!).
Anyway, I was struck by the elegance of this motif and had to make it. I find it graceful.
No.14 of 25-motif challenge
The centre hearts are a little fiddly to make
but overall it's a straightforward design to tat.
Do you like it?