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. Granite is an intrusive, igneous stone usually found in the continental plates of the Earthâs crust. Igneous stones are mainly formed through volcanic material underneath the Earthâs surface, or liquid magma that has cooled and solidified.ranites are primarily composed of mica, feldspar and quartz, though additional minerals and trace elements give the stone a stunning array of possible colors. Graniteâs hardness and durability make it optimal for heavy-duty uses, such as flooring, countertops and vanities.