I don't know what it is but I love this shape. Scallops, clam shells, fish scales, baptist fans. I love it so much that I actually just bought more of this fabric in tan. I harbor an ambition to make Latifah Saafir's Glam Clam quilt. So yeah, I'm really digging on this particular hexie triangle. I like the orientation I ended up on, it's totally not what I saw when looking at the fabric on the bolt.