Gemini Dice are part of the Chessex Signature Series Dice. Signature dice are a compilation of the best selling colors of new dice released in the past few years. It includes a wide variety of colors and materials, but each is a unique and interesting addition to any dice collection. This set contains one d20, one d12, two d10 (00-90 and 0-9), one d8, one d6, and one d4.