There are several. Bonashees lets you make one with 10 bones, Wall Ride lets you make three with three bones, three apples, three wheat, and one green potion, and Kalker lets you make five with four diamonds (I forget their name in-game), three bones, two eyes and an apple. Since I know two of these recipes, I always end up with more shiny crystals than diamonds...oh, well.
I'd recommend you read the master list of recipes; it answers a lot of questions. Note that when your character doesn't know a recipe, you only have a 50% chance of success with it.
