That powder you see is the pumice stone remnants.
Hard water stains on black granite.
Keeping the granite dry particularly in these areas prevents the lime buildup that leads to hard water.
These stains will leave behind mineral deposits.
Just about 20 seconds of light rubbing and then wash and wipe up the bar keepers powder.
I also cleaned the corner seam along the back of the sink area.
The minerals in hard water cause a different kind of stain on granite.
Removing water stains from granite typically involves the use of a poultice.
However if they are used in too high a concentration they can break down the surface of the granite and cause it to become more porous.
The second type of water stain is caused by hard water that is water with a high mineral content that sits on the counter dries and leaves a deposit often resulting in bothersome circles that build up around the faucets.
Hard water accumulation removal to remove hard water stains from granite and other natural stone start by using a new single edge razor blade gently scraping and shaving the buildup from the surface of the stone to prevent scratches.
You can also use a single edge razor blade to gently scrape away the residue or a safe on.
Start rubbing at the water stain on the granite.
Avoid letting water pool around the faucets by drying the area each time you use your sink.
You shouldn t have to scrub hard.
Then using a wet pumice stone just go to town scrubbing the hard water stains away.
On the other hand hard water stains are the result of hard water getting into the pores of the stone.
If you find your beautiful granite marred by either one of these types of stains don t worry.
Hard water is water that is particularly high in mineral content.
A soft cloth a sharp razor blade granite cleaner gloves denatured alcohol dish wash detergent water baking soda white vinegar paper towels.
The pumice stone will break down as you use it because it is much softer than the granite.
In small concentrations rubbing alcohol and hydrogen peroxide can be used to lift stains and water rings on granite.
How do you remove water stains from granite.
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.