Quartzite is a compact granular rock composed of quartz crystals, usually so firmly cemented as to make the mass homogeneous, or, it is a silver-gray, metamorphic sandstone formed in exceedingly hard layers. In some deposits, intrusion of minerals during the formation process created unusual shades of brown and gold. The stone is generally quarried in stratified layers, the surfaces of which are unusually smooth, and the crushing and tensile strength are extremely high. At Holbrook Granite and Marble, we are fabricators and installers of quartzite countertops, bar tops, vanities, tub surrounds, and other applications. Contact us today to discuss your quartzite installation.