a gold nugget is a non-mineral

Edward Hargraves did not find a nugget of any notable size. Hargraves was important for the fact that he (or rather, two men he employed) found the first payable gold in Australia, and thus started the Australian Gold rush in 1851.

An Australian 1994 1 ounce gold nugget coin ($100 Whiptail wallaby), in absolute mint condition could fetch up to $1,300 AUD.

There were 122 minted.

A reputable coin dealer will be able to give a more accurate valuation.

gold

You take the gold nugget to nabooti island and go to the traders. In return for the gold nugget, they wil give you something to help you finish the game.