Avocado Stones Carved while the seed is still fresh, it will dry and harden like stone. While the seed is drying, the colors start changing, first the carving, turning a deeper red, then the spaces between. The seed will split on its own, and soon after it will be fully hardened. Each seed is unique, each design is unique, finely carved as one whole and splitting into two halves. Creating a one-of-a-kind pair of pendants.