Zillow CEO Spencer Rascoff, shown in his downtown Seattle office, says Zestimates are a good starting point but that nationwide Zestimates have a median error rate of about 8%.
What is Granite? Granite is a light-colored igneous rock with grains large enough to be visible with the unaided eye. It forms from the slow crystallization of magma below Earth's surface. Granite is composed mainly of quartz and feldspar with minor amounts of mica, amphiboles, and other minerals.
Granite is the signature rock of the continents. More than that, granite is the signature rock of the planet Earth itself. The other rocky planetsâ Mercury, Venus and Marsâare covered with basalt, as is the ocean floor on Earth. But only Earth has this beautiful and interesting rock type in abundance.irst, granite is made of large mineral grains (which is where its name came from) that fit tightly together. Second, granite always consists of the minerals quartz and feldspar, with or without a wide variety of other minerals (accessory minerals).