Granite
Granite is a coarse-grained igneous rock composed chiefly of orthoclase, albite feldspars, and quartz, usually with lesser amounts of one or more other minerals, as mica, hornblende, or augite. Other stones compared to this rock in great hardness, firmness, or durability tend to be called granite as well.
Durability:
Resistant, one of the best options for countertops, and especially for outside kitchens. (natural & hard)
Marble
Marble is a metamorphosed limestone, consisting chiefly of recrystallized calcite or dolomite, capable of taking a high polish, occurring in a wide range of colors.
Durability:
Low resistance, daily or monthly maintenance. (natural & soft)
Quartzite
Quartzite is a granular metamorphic rock consisting essentially of quartz in interlocking grains.
Durability:
Much harder stone and just as resistant as granite. [For outside use, please check with fabricator first] (natural & hard)
Quartz (Engineered Stone)
Quartz is a chemical compound consisting of one part silicon and two parts oxygen (silicon dioxide). Its unique properties make it one of the most useful natural substances. Quartz for surfaces is manmade, by combining 97% Crushed Quartz and 3% Resin. This makes the stone just as strong as granite, but slightly heavier.
Durability:
Resistant and durable like granite, but does not withstand really high temperatures, not for outside kitchens. (man-made & hard)