Hi there, perhaps this will help! https://homeguides.sfgate.com/clean-stone-coasters-105585.html
https://homeguides.sfgate.com/clean-stone-coasters-105585.html
https://www4.bing.com/videos/search?q=how+do+I+Clean+stained+stone+coasters%3f&qpvt=how+do+I+Clean+stained+stone+coasters%3f&FORM=VDRE
https://ezinearticles.com/?Cleaning-Stone-Coasters&id=3611188
Scrub brush bleach if not
I've used a paste made from baking soda and salt on mine, but any abrasive cleaner like Comet or Bar Keeper's Friend will also work. I used a toothbrush to clean with to get down into tiny holes in the stone.
What is the best way to clean hardwood floors in the kitchen?
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Vinegar seems to be the answer to everything. So how do I use it to clean my mirror?
How do I wash pillows to remove the smell of smoke?
Can someone give advice on how to clean quartz countertops to rid them of hard water stains?
Jay
Hi there, perhaps this will help! https://homeguides.sfgate.com/clean-stone-coasters-105585.html
https://homeguides.sfgate.com/clean-stone-coasters-105585.html
https://www4.bing.com/videos/search?q=how+do+I+Clean+stained+stone+coasters%3f&qpvt=how+do+I+Clean+stained+stone+coasters%3f&FORM=VDRE
https://ezinearticles.com/?Cleaning-Stone-Coasters&id=3611188
Scrub brush bleach if not
I've used a paste made from baking soda and salt on mine, but any abrasive cleaner like Comet or Bar Keeper's Friend will also work. I used a toothbrush to clean with to get down into tiny holes in the stone.