One coin features the iconic Vulcan hand salute alongside the words "Live long and prosper".
Conservationists remove the equivalent of 10,000 coins that had been wedged into the Giant's Causeway's pillars.
St Wilfrid's Church in Melling, near Lancaster, was set to close when the gold coins were discovered.
The new coin marks 25 years since Peter Jackson's first Lord of the Rings film.
The collection, built up by Mac McCarthy from Cornwall, fetches £21,830 at an auction in London.
Fewer than 300 of the gold "Una and the Lion" coins were produced, with one found in a Bangor estate.
A total of 213 coins discovered in a cottage in Dorset are expected to reach £30,000 in auction.
Clinton Bowen disappeared during his trial for the theft of £500,000 of rare coins from a dealer.
The 5p, bearing the King’s head and an oak leaf, follows the earlier release of new £1 and 50p coins.
