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Includes display base (not pictured). 99.95% pure tantalum cube. One of Earth's rarest elements. 1" x 1" x 1". High density. Surprisingly heavy. Great conversation piece. Includes certificate of chemical composition. Machined from electronics-grade conflict-free tungsten, this cube is an excellent contemporary addition for your desk at work or side table at home. Surprise your colleagues and friends with the cube's weight, yet fitting into the palm of your hand. Tantalum is one of the densest and rarest naturally occurring elements, and now you can add one of nature's wonders to your own collection. If you like the cube, don't forget to check out our other tungsten and aluminum shapes and toys.