Gemini dice have the splendid effect of two colors being swirled together.
Chessex 16mm d6 Dice Block: Vortex Bright Green/black
Chessex Gemini 16mm d6 (12 dice) - Translucent Red-Violet/gold Dice Block
Chessex Gemini 16mm d6 Luminary Dice Block (12 dice): Pearl Turquoise-White/blue
Chessex Gemini Poly 7 Set: Blue-Green/Gold
Chessex Gemini Poly 7 Set: Black-Blue/Gold