The phrase "a priceless treasure" is correct and usable in written English.
It can be used to describe something of immense value that cannot be measured in monetary terms, often in a sentimental or emotional context.
Example: "The family heirloom was not just a piece of jewelry; it was a priceless treasure that held generations of memories."
Alternatives: "an invaluable gem" or "a treasured possession."
Amiatinus is undoubtedly a priceless treasure in Italy, but it is a priceless treasure among countless priceless treasures.
"It has no economic value but it is a priceless treasure that links our present foundation with its founding father, St Laurence O'Toole," he said.
As de Hamel sits supervised by a hawklike librarian, or alone behind a photocopier with a priceless treasure, one can't help but think of the Book of Kells alone in the mud, discarded like garbage.
The Hobbit is the tale of a hairy footed homunculus named Bilbo Baggins who sets out with 13 dwarves and a wizard, Gandalf, to wrest a priceless treasure from a sly old dragon.
His description of how half of the Angolan city of Luanda was shipped away in crates during its siege, "as if a pirate fleet had sailed into the port, seized a priceless treasure and escaped to sea with it".
On safe, white beaches, the children would play among the breakers, collecting exotic shells and perhaps discovering a priceless treasure washed ashore, or a bottle from a far-off land containing a coded message that would take many chapters to unravel.
"This is very important to us, and it would just be an extraordinary, priceless treasure for New York City to receive.
And maybe once in a while Andy unwrapped a troubled dream in the form of a cheap or priceless treasure from years ago.
All she asked was Ronnie's assistance in moving a chest of priceless treasure across the Austrian border into Switzerland and selling it.
Behind you, in the Piazza Marina, a shambolic Sunday flea market offers every unwanted knickknack and oddment you ever yearned to throw away, plus, of course, a few priceless treasures.
The evening begins with "The Man Who Would Be King" (1975), John Huston's film about two con artists (Sean Connery and Michael Caine) who set out to take over a remote Asian land with priceless treasure.
