No British general circulation coin is made from gold, however, the Royal Mint produces Proof coins for serious collectors and investors. Some of these are struck in precious metals such as silver or gold, and occasionally platinum.
The British One Pound coin featuring the Royal Arms on the reverse was struck in 1983, 1993, 1998, 2003 and 2008.
The 2008 coin was produced as Proof FDC in silver, gold and platinum.
The British nickel-brass One Pound coin featuring the Royal Arms design on the reverse was minted for general circulation in 1983, 1993, 1998 and 2003. All issues of these coins have "DECUS ET TUTAMEN" inscribed on the edge. The only "gold" coin struck with this design was in 2008 as "Proof in gold FDC". Only 3,000 were minted.
The first gold Fifty Pound coin issued by the Royal Mint was in 1987.
The Royal Mint issued no gold Two Pound coins from 1938 to 1952 inclusive.
A 1889 gold 5 pound coin is worth 5 pounds of gold, while a 1889 2 pound gold coin is only worth 2 pounds of gold.
The Royal Mint has produced a 22 carat gold Five Pound coin in most years since 1980. Depending on whether the coin is "Proof FDC" or "Uncirculated" and some minor variations, it might get anything from £800 to £900 GBP. Prior to decimalisation, gold Five Pound coins were mostly minted in Coronation and Jubilee years.
The Royal Mint "invented" the Five Pound coin. The gold Five Pound coin (quintuple Sovereign) was first issued in 1820 when it effectively replaced the Five Guinea coin. The gold Five Pound (Sovereign) coin was issued infrequently, mostly when a new King or Queen took the throne, and in their various Jubilee years. The modern gold Five Pound coin has been issued as a non-circulating bullion coin since 1980. The decimal cupro-nickel Five Pound (Crown) coin was first issued in 1990 and is intended as a legal tender non-circulating commemorative coin, usually commemorating some regal event or occasion.
There has been a British Five Pound coin on and off since 1817. The British decimal Five Pound gold bullion coin was first issued in 1980 and the Five Pound "Crown" coin was first issued in 1990. The current British Five Pound "Crown" coin is intended to be a non-circulating legal tender commemorative coin. The Royal Mint has no current plans to produce a general circulation Five Pound coin in the foreseeable future.
As I type this the value of 1 pound of gold is $18,040.00
The Royal Mint issued no 1977 commemorative gold coins.
No, it is not a Five Pound coin. There were four different gold coin issued in 1911 with George V on the obverse and St George and the Dragon on the reverse. The Five Pound and Two Pound, both as Proof only, and the Sovereign and Half-Sovereign. The Five Pound coin was the largest of the gold coins in 1911 at about 38mm. The Half-Sovereign was the smallest of the gold coins in 1911 at 19.5mm. I cannot find any reference to a 1911 British 16mm gold coin.
In British Decimal currency, the One Pound coin was first issued for general circulation in 1983. The British Two Pound coin was first issued in 1985 as a collectible gold coin. It was first issued as a nickel-brass Commemorative in 1986, and as general circulation coin in 1997.
If the coin is made from gold, it will say so on the packaging it was sold in.