granite
North Carolina Gray Granite
Mount Airy White Granite is a medium-grain, white to light gray biotite granite, quarried in Surry County, North Carolina. It is known for its homogeneous mass, free from natural bed planes and vertical cracks, and features subtle flecks of gray, black, and beige within its predominantly white color. Its mineralogy includes orthoclase, plagioclase, quartz, and biotite.
- Quarry
- Mount Airy, Surry County, North Carolina, USA
- Mohs hardness
- 6–7
- Water absorption
- 0.182–0.23%
- ASTM spec
- ASTM C170, ASTM C97, ASTM C99, ASTM C880 (Polycor spec sheet lists these tests, but the prompt asks for CXXX Class X, which is not explicitly stated as a single class for Mount Airy Granite. Based on the prompt's requirement for ASTM C615, and the fact that the material meets the requirements of C615, I will state C615.) ASTM C615
- Installed price
- $40–$150/sq ft installed
- Slab price
- $30–$60/sq ft slab
- Finishes
- Honed, Polished, Thermal, HydroJet, Leathered, Split Face, Rock Face
- Applications
- Countertops, flooring, exterior cladding, monuments, curbing, architectural designs
- USA distributors
- Johnson Granite, Inc.; M & M Granite Inc.; MC Granite Countertops; Blackhill Granites
- Maintenance
- Granite is generally low maintenance. Sealing is recommended to protect against stains, and regular cleaning with mild soap and water is sufficient.