What is a Rock Waja on Wajas.Com?

On Wajas.com (also Wajas.net or Wajas.org), a Rock Waja is an item that is generally not buyable in any of Wajas' main shops (the Accessory, Pear, Dye, Pet or Token shops) or the Leaf Exchange. This item, when used on any Waja, turns it into an African Waja. For those who don't know, and African Waja is a breed of Waja that cannot be acquired in any other way than by using a Rock Waja on your already existing Waja of another breed.