The Cast Diamond is designed by Scott Eliott from Oregon, United States. He's been interested in puzzles ever since he stole his sister's Rubik's cube back in the 1980s! Now, he builds his own puzzles too, like the Cast Diamond, Cast Love, and the Monkey's Nuts. The Cast Diamond is one of the classic Hanayama cast metal puzzles that are famous the world over. A simple and sleek design that forms a diamond shape when placed  together.