Just did a little research on granite. Darker colors are less porous and would need less sealing maintenance. Lighter colors are more porous. Setting a hot pot down on top of a granite countertop is not recommended at all as it can cause the granite to crack. Granite is a natural stone and for that reason it is porous and can absorb stains, water, grease, etc. Regular sealing will keep the granite from absorbing these stains. You need to seal granite either once a year or more often depending on how porous your stone is. You can test your granite with a wet glass of water and let it sit there for a while. If the stone shows a wet ring after you remove the glass, you need to reseal your granite. There is a lot of information on granite maintenance on the Internet, just Google it. Granite is beautiful. It just needs periodic sealing to keep it that way.
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