This is Fox's beautiful "Lillian" design, which I had the honor to test tat. The pattern can now be found in her Etsy shop.
This is a very interesting design to tat. You can choose to make it 3D or flat, depending on the size of the doodad and the thread size; you can add or subtract beads; and if you use it as a pendant, you can add the findings to make it hang vertically or horizontally.
The HDT is Krystledawne's "Thunderheart", which is my new favorite colorway. As soon as I received it, I knew that I needed to use it for Fox's pattern.