This is a question I have for Earth Science. My answer needs to be based on the different properties of the rock. One idea I have is that granite is more durable because it is coarse-grained and marble is fine-grained, but I can‘t think of anything else. Please help!
I think Granite floors would be the more durable than marble floors because Granite is very hard, durable and long lasting. It is also more stain-resistant. Granite can be used in kitchens, bathrooms and entryways, due to its resistance to moisture and for its durability. Whereas Marble is so heavy that the floor needs extra support for carrying the load. Marble floors demand regular maintenance. So you have to spare some time regularly to maintain the beauty of your flooring.
Physical Properties of Marble Physically, these are recrystallized, Hard, Compact, fine to very fine grained metamorphosed rocks capable of taking shining polish. Hardness 3 to 4 on Moh's Scale Density 2.55 to 2.7 Kg/cm3 Compressive Strength 70 to 140 N/mm2 Modulus of Rupture 12 to 18 N/mm2 Porosity Quite low Chemical Properties of Marble Chemically, they are crystalline rocks composed predominantly of calcite, dolomite or serpentine minerals. The other minor constituents vary from origin to origin. Lime (CaO) 28-32%, Silica (SiO2) 3-30% (varies with variety), MgO 20 to 25%, FeO + Fe2O3 1-3 Physical Properties of Granite Physically, commercial granites are Hard, Compact rocks with fine to coarse grains of metamorphic or igneous origin. Hardness 6 to 7 on Moh's Scale Density 2.6 to 2.8 Kg/cm3 Compressive Strength 140 to 210 N/mm2 Modulus of Rupture 15 to 25 N/mm2 Porosity Quite low Chemical Properties of Granite Chemically, they are igneous/metamorphic rocks composed of quartz, feldspar ferromagnesian minerals like kriolite, chlorite, garnet, etc. A typical granite will have following chemical composition: Silica (SiO2) 70-75%, Al2O3 10-15%, CaO+MgO Less then 0.5%, FeO + Fe2O3 2-4%, Alkalies 4-6%, TiO2 Less then 0.5% Granite is the hardest building stone, and granite slabs and granite tiles occupy a prominent place among dimensional stones. Due to its hardness, resistance to weathering, capability to take mirror polish, fascinating colors and textural patterns, granite slabs and granite tiles are extremely popular. So, as you can see, granite would be more durable, based on its properties.
