Granite is a more suitable and durable stone than marble to use for a kitchen benchtop as it has a high resistance to scratching and heat, will not etch with acidic liquids and does not absorb moisture like marble. It is also more resistant to bacteria as it is less porous. Beware of cheap imitation granites though as these contain some calcite and will etch. Test with some lemon juice to ensure the stone you are purchasing is pure granite. If the stone contains some calcite it will etch or develop a dull spot. If you use marble expect it to stain and understand that to keep it looking good it will require regular repolishing.
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