"invaluable ability" is a correct and usable phrase in written English.
You can use it to refer to something that is incredibly useful or valuable in a given situation. For example, "His years of experience gave him an invaluable ability to lead the team."
In particular, she demonstrated the invaluable ability to deliver whoppers with apparent sincerity.
He was also blessed with intuition and an invaluable ability to learn from experience.
All share the same sweetness as carrots, and have a similar invaluable ability to keep a cake moist.
In this she proved a brilliant businesswoman, one who brought to her job an invaluable ability to persuade capricious artists and directors that her way was right.
But a failure to heal the rift could hurt the county machine's invaluable ability to produce the big Hudson County turnout that the Democrats need to win statewide races.
Yet when they are under the most severe pressure, they have the invaluable ability of finding a great performance.
Skills that can give you invaluable survival abilities are very important.
She has an impressive empathic ability — invaluable in politics or statecraft — to imagine how the world looks to an ally or adversary.
One particular focus within this area that many graduates will find invaluable is the ability to write computer programmes incorporating a graphical user-interface (GUI).
City Ballet has some other men who partner as well or better — including Charles Askegard (Prince Siegfried in Thursday's "Swan Lake") and Philip Neal (the Hoofer in "Slaughter") — but none match Mr. Angle's ability, invaluable in ballet, to look wide-eyed at a woman as if his heart had found its destiny.
It has also given birth to thriving civilian industries built by entrepreneurs who gained invaluable technical skills, leadership abilities and personal connections in the military.
