African Jade is referred to as Buddstone, Budstone or South African Jade.
Even though one of the names of Buddstone is Jade, it actually has very little relation with other varieties of Jade. African Jade can be best described as Metamorphic rock, because it consists of various different minerals. Beautiful green color of this gemstone is a result of a few green minerals that are found inside this rock - Fuchsite, Epidot or Chlorite.