



Thomas P. Dolley, the U.S. Geological Survey dimension stone commodity specialist, has compiled the following information on dimension stone, an abundant natural resource that is produced by one of the world’s oldest industries.
Dimension stone is not actually any one type of rock. Instead, it is any natural rock material quarried for the purpose of obtaining blocks or slabs that meet certain size (width, length and thickness) and shape specifications needed for building. Color, grain texture and pattern, surface finish, durability, strength and the ability of the stone to take a polish are also important selection criteria.
Although numerous varieties of igneous, metamorphic and sedimentary rocks are used as dimension stone, the principal rocks used are granite, limestone, marble, sandstone and slate. Significant deposits of granite and marble can be found from Alabama to Maine in the United States. The Carrara District in northern Italy has also long been a significant producer of marble, as have China, Greece and Spain. Brazil, Canada, China, South Africa and the Scandinavian countries produce significant amounts of granite from large reserves.
Scientific descriptions of dimension stone typically focus on a stone’s geographic origin and mineralogical composition, whereas commercial descriptions focus mainly on the geographic origin and color of the stone. Various combinations of the scientific and commercial descriptions are used by stone producers to market their stone products effectively, as with Rock of Ages Corp.’s Barre Gray granite or Polycor Inc.’s White Georgia marble.
Production of dimension stone starts with rough stone blocks that are split or cut from a quarry face and then transported to processing plants typically located at the quarry, at least for preliminary sizing. Final sizing and finishing operations, such as decorating, edging and polishing, may be completed at the quarry or elsewhere.
Dimension stone has been used since antiquity, and many ancient buildings and monuments around the world that were built with various types of dimension stone still survive today. These ancient buildings and monuments often served as symbols of power and technological prowess for their respective civilizations.
With the advent of construction methods using reinforced concrete and steel in the 19th and 20th centuries, dimension stone ceased to be a major structural component in building construction. During the last three decades, there has been more demand for the aesthetic qualities of dimension stone, and the industry slowly has diversified into the growing markets for home improvements, including the use of dimension stone in kitchen countertops, home restoration, historic preservation, and new home and commercial construction.
For more information on dimension stone and other mineral resources, visit: minerals.usgs.gov/minerals.
Dimension stone production and consumption
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