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 hard igneous stone that is formed over millions of years by volcanic activity. Magma flows from volcanic activity and slowly cools over millions of years. During the process, magma combines with various minerals including hornblend, feldspar, mica and quartz to create its crystal appearance.