Our forest creature pins are sculpted from clay, and then cast with marble dust, resin, and pigments such as iron oxide. Eyeballs are semi-precious stones, such as Onyx and Garnet. 
As each creature is hand-cast, there is a lot of variation in colors, especially with the birds and rabbits. Cast the dice and see what you might get, or contact me for photos or requests. I'm happy to make custom color combinations.