It's some type of kite shaped stack & whack in the center. It reminds me of Jinny Beyer's stuff. Possibly Kaye Woods. I would check out both their sites for the pattern. Also, Cheryl Phillips is promoting some new ruler & method that makes these type blocks without set in seams. Bethany Reynolds is a possibility, also if it's an updated version of her Stack 'n' Whack method.