African Jade or Prase tumbled pieces in a bracelet. Chip bracelets are done with small tumbled pieces gemstones strung together on an elastic thread. The only different between these bracelets and power- or buddha- bracelets is the shape. Power bracelets are carved into spheres and the tumbled ones are left in a more natural shape. The properties are the same in both kinds of bracelets. The decision is purely which you would prefer to wear.