The phrase "a brilliant pool" is correct and usable in written English.
It can be used to describe a pool that is exceptionally clear, attractive, or inviting, often in a metaphorical sense.
Example: "The resort featured a stunning landscape, with a brilliant pool that sparkled under the sun, drawing guests in for a refreshing swim."
Alternatives: "a dazzling pool" or "an exquisite pool".
McCarthy's narrator watches the ferry from Manhattan, with the sun "haloing it, transmuting it into a brilliant orange pool that spread across the harbor like a second mass of water … This pool of light was spreading right towards the ferry, swallowing it up, dismantling it pixel by orange pixel".
Whenever Kiki tilts her face upward, toward her key light — and like any self-adoring goddess, she does that a lot — her eyes brim with the most brilliant pools of brine you have ever seen.
He's a brilliant poet, a brilliant memoirist, and a brilliant novelist.
In summation Conscious Me has the potential to be an incredibly useful global resource, and a brilliant way of pooling our collective knowledge of all the marvellous things happening in the world.
You can get a brilliant cardiovascular workout in a pool and I was quickly away, swimming lengths as freely as I had once run.
Real life, after all, churns still more powerfully beyond the aquamarine bubble of an Olympic swimming pool and a brilliant girl called Missy.
She had graduated as the valedictorian of her high school, but she couldn't afford college, so she worked and slept her way out of the steno pool — and into a brilliant career in advertising.
Rakoff, regarded as a brilliant but unpredictable jurist, alone will question the jury pool.
The reflections of shooting stars light up the saltwater pools around the hotel, and the glacier glistens a brilliant white in the moonlight.
A small, white pool house with three porthole windows and a curved glass-block facade stood next to a brilliant blue water slide.
