These are formed by the water that flows into the home and is fairly common in most cities.
White rings around faucet on granite.
Maybe they used plummer s putty at your faucet connections.
For those tenacious water rings around a faucet resulting from hard water that sits on the surface try scrubbing softly with a brillo pad or gently scraping with a razor blade then wiping away the residue with a soft damp cloth.
Poultice products made especially for granite can be purchased at a hardware or stone surface specialty store or you can make your own paste using flour plus hydrogen peroxide.
You need a water softening system.
When hard water sits on a granite surface and dries it leaves a visible mineral deposit that often creates white rings especially around faucets.
For really stubborn stains try using a poultice or extractor.
A water filter may not be sufficient to deal with hard water.
Rinse the granite sink thoroughly with hot water.
Hard water can create a calcium buildup which is also called limescale or lime deposits.
And your hard water may be contributing as well.
It had to do with using plummer s putty to seal faucets at stone level.
Hard water stains around the faucet.
The ugly white or yellowish rings around the faucet base aren t unusual.
Scrub the granite sink with the scrubbing pad.
You can also use a single edge razor blade to gently scrape away the residue or a safe on stone pad to scrub the area softly before rinsing and drying.
For this kind of stain use a specially formulated granite cleaning product like granite gold daily cleaner and scrub with a soft bristled brush then rinse and dry with a soft cloth.
It was deemed not a good idea as a plummer s putty ingredient tends to bleed through granite and leave the type rings you describe.