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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 a common and widely occurring type of intrusive, ingenious rock formed from Lava. Most Granite is located throughout the continental crust, usually at a depth of 1.5 km and up to 50 km. Granite has a medium to coarse texture, occasionally with some individual crystals larger than the ground mass forming the rock. This makes Granite quite rich in depth and color variation within each piece. Granites come in shades of Pink, Blue, Green and Gold to Gray, and even Black. Granite is very Hard and Tough, with an average Density of 2.75 g/cm3.