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Lemon Test - The lemon test is to determine the ability of your granite to resist etching. Follow the steps below: 1  Place a wedge of lemon or lime, cut side down, on the sample overnight. 2  Wipe the sample in the morning and hold it at an angle to the light.  Check for a rough spot where the lemon was placed.
Granite is available in variety of color, but black is the most preferred for kitchen counter tops and window sills.Look for natural black granite stone. These days granite is dyed to black to give it a rich look. To check for this, apply a nail polish remover or acetone on a cloth and rub on granite.ranite is available in variety of color, but black is the most preferred for kitchen counter tops and window sills.