Pictures of your coin would be nice.
However I can say that in 1994 Fijian 50 cent coins were made of Stainless Steel and not Cupronickel like Australian ones.
These Fijian coins also weighed only 13.1 grams compared to 15.5 for the Australian one. They were the same size and shape, but since 1990 all Fijian coins to 50 cents were minted in stainless steel (The 1c and 2c were copper plated).
Outsourcing is common for smaller countries coinage. NZ's coins have always been made overseas due to us not having a mint and its the same story for Fiji and every other Pacific Island nation. Most are made at
The Royal Mint in the UK, many steel coins at
Royal Canadian Mint and Australia also mints a few. French Polynesian and New Caledonian coins are minted in France.