This is a nine-sided die (d9) made by truncating a sphere with nine equally-sized landing positions. The design is based on the solution to the Thomson problem and has three-fold prismatic symmetry. The three groups of three numbers at 120° sum up to 15 (similar to the 3 by 3 magic square).
For ease of recognition, the dice in this series are by default only available in full color, with base color according to the last digit of the highest number (9 = black). Other colors may be requested.
Click here to view all the dice currently available in this series
For other speciality polyhedral dice check out:
Impact! Miniatures, The Dice Lab (mass-produced)
Odd Ball Dice, PropModule, The Magic Shop (Shapeways)