The Spoonflower Handbook is here!
This gold network of triangular curves weaves into a mesh. It accompanies the Trinity series, which includes cut-and-sew religious paraments and an ornate collar for theatrical costume design.
The hint of blue shown in the close-up prints as white, which I expected -- it was added for a little subtlety of color. The design is very similar to the Celtic trinity knot, but my own design.