What is the difference between granite and marble?

In general, granites are igneous (formed by heat and pressure) stones which are composed of several different minerals including quartz, feldspar, mica, and hornblende. Marble is a sedimentary stone formed by minerals being deposited out of water in a crystalline form. Granite, because of its density and composition, is more resistant to bending, heat, abrasion, and chemicals. Marble, on the other hand, is a softer less dense and more porous stone, which makes it more susceptible to breaking, abrasion, and staining. Marble is also a calcium based stone which makes it extremely sensitive to acid based materials which will cause etching, pitting, and staining. Marble is probably not the best selection for kitchen applications unless the customer is willing to accept these conditions. Both stones require a sealer to prevent future damage.

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