Etsy seller Niquegeek made these 3D printed stainless steel dice that resemble the beloved weighted companion cubes from the game Portal. They're hollow, and retail for $29.
This unique die (singular dice) is made layer by layer in a 3D printer and then fired to fuse the metal particles into solid steel.
It is available in a numbered version, a version with just hearts (similar to the pendant I also make) and now a numbered version with a heart for the 1! It makes the perfect gift for the Portal fan in your life!
Each side of the cube measures 9/16" across and it is hollow so it's much lighter than it looks. Each pendant is unique and the finish may vary slightly from the images.
Weighted Companion Cube Die - Stainless Steel - (Portal Dice) (via The Mary Sue)