There were two different types of Australian 1954 Florin minted. The standard type with the Australian Coat of Arms on the reverse, and the Queen Elizabeth II Royal Visit commemorative Florin. The commemorative Florin has the Kangaroo and the Lion, the two animals symbolising Australia and England respectively.
The Australian Florin was never minted in gold.
The Australian 1954 Florin (Two Shillings)(Royal Visit Commemorative), was minted only as a 50% silver coin. There is no evidence suggesting that the coin was ever produced in gold. If you have a gold coin, it is because somebody had it plated. Modified coins have no value.
There were only three years from 1938 to 1963 in which the Australian Florin (Two Shillings) was minted at a Mint other than the Melbourne Mint. Some 1942, 1943 and 1944 Florins were minted at the San Francisco Mint. There is a very small "S" mintmark between the 9 and the 4 on these coins. Florins minted in Melbourne during this period have no mintmark.
There were no Australian Florins minted until 1910.
If you refer to the collector value of 1954 Australian coins, not much. Any value would be dependent on the condition of the coins.
There were no New Zealand Florin coins minted from 1954 to 1960 inclusive. There were no New Zealand Halfcrown coins minted from 1954 to 1960 inclusive.
I presume you refer to the Australian Florin which seems to be the only 1954 Florin (2 Shilling) that is significantly different from the rest. It is a Commemorative coin issued for the Royal Visit to Australia by Queen Elizabeth II, and was minted in Melbourne. Its composition is 50% silver, 40% copper, 5% zinc, 5% nickel, the same as all Australian Florins from 1938 onwards. The obverse is the same design for the period, featuring a youthful Queen Elizabeth II, designed by Mary Gillick. The reverse is the only significant difference featuring a "British Lion" and an "Australian Kangaroo" standing side by side, with "Australian Florin" around the top, and the year "1954" at the bottom, and designed by William Leslie Bowles. An Australian 1954 Florin, uncirculated and in absolute mint condition could fetch up to $50 AUD. If it has been circulated but still in good condition, it might fetch anything from $3.50 to $12 AUD. There were 2 million minted. A reputable coin dealer will be able to give a more accurate valuation.
Pictures of a specific coin are difficult to come by. Frequently you should be able to find one on eBay, but the picture is withdrawn after the coin is sold. The 1927 Australian Halfpenny is almost identical to the 1911 Halfpenny shown. The 1927 Australian Florin is almost identical to the 1911 Florin shown. See the links below.
The first Australian coins to be put into circulation were the Threepence, Sixpence, Shilling and Florin in 1910.
A gold florin typically weighs around 3.5 grams.
The first "Australian" coins were put into circulation in 1910. They included the Threepence, Sixpence, Shilling and Florin (Two Shillings).