Excellent used condition All pieces included Beautiful—and fiendishly difficult—these cutting-edge geode puzzles seduce the eyes while challenging the brain. And like real agate, this design has a distinct shape, color, and pattern. The way they're made is inspired by how a geode's crystalline structure is created in nature: a special simulation program develops an image by layering color that radiates from the puzzle's edge; an algorithm generates the puzzle piece patterns; and a computer-guided laser cutter shapes the pieces from birch plywood. Made in New York. Due to the nature of this item, each is unique and will vary.