19 Piece Japanese crystal - Interlocking Puzzle
The 19-Piece Japanese Crystal Puzzle is based on a historical design of the same name, first created in Japan around the 19th century. This magnificent and beguiling puzzle is one of the most rigorously challenging puzzles in the construction category. The perfectly symmetrical, multifaceted, celestial structure is made from 19 non-identical, interlocking pieces. Each piece is precisely cut so that they interlock perfectly into a solid, crystalline structure.