Fiji was part of the Polynesian culture complex, in which gifting and obligation were practiced instead of monetary economics.  There was a hierarchy of values for things.  The tambua was pretty much at the top.  To go higher involved things like slavery and human sacrifice.  You can see a tambua on the current Fiji 20 cents coins.  They are very rare, highly prized, specimens currently in Fiji are prohibited from export.  I think this is the only one on the web.