Original 3D Crystal Puzzle - Treasure Chest Black The Black Treasure Chest 3D Crystal Puzzle from BePuzzled is a sleek, translucent puzzle with 52 unique interlocking crystalline pieces, including key Take puzzling to a whole new dimension with this stunning, yet functional crystal puzzle Enjoyable to work on, challenging to complete and beautiful to display This 3D puzzle has a difficulty level of 2 and is fun for puzzlers age 12 and up Approximate assembled size = 3-1/8" x 2-3/8" x 2-1/2", 4" open