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The National Register is a federal register for buildings, structures, and sites of historic significance. This is intended to be a complete list of the properties and districts in Columbus. There are 360 properties and districts listed on the National Register in Franklin County, including 3 National Historic Landmarks.
In archaeology, the term alabaster includes objects and artefacts made from two different minerals: (i) the fine-grained, massive type of gypsum, [1] and (ii) the fine-grained, banded type of calcite. [2] Chemically, gypsum is a hydrous sulfate of calcium, whereas calcite is a carbonate of calcium.
The site was listed on the National Register of Historic Places in 1976 and the Columbus Register of Historic Properties in 1982; the district boundaries differ between the two entries. [ 1 ] [ 2 ] The Snowden-Gray House , a High Victorian -style two-and-a-half-story mansion with a cupola , built in 1852, is salient in the district.
Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO 3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on the Mohs scale of mineral hardness, based on scratch hardness comparison. Large calcite crystals are used in optical equipment, and limestone composed ...
Limestone often contains larger crystals of calcite, ranging in size from 0.02 to 0.1 mm (0.79 to 3.94 mils), that are described as sparry calcite or sparite. Sparite is distinguished from micrite by a grain size of over 20 μm (0.79 mils) and because sparite stands out under a hand lens or in thin section as white or transparent crystals.
Jaspillite – Banded mixture of hematite and quartz; Laterite – Product of rock weathering in wet tropical climates rich in iron and aluminium; Lignite – Soft, brown, combustible, sedimentary rock; Limestone – Type of sedimentary rock; Marl – Lime-rich mud or mudstone which contains variable amounts of clays and silt
The site was listed on the Columbus Register of Historic Properties in 1985 and the National Register of Historic Places in 1987. [1] The district is significant for its architecture, landscape architecture, and community planning. The houses are of the early 20th century, using stone, brick, and stucco. [2]
calcite A mineral that is the crystalline form of calcium carbonate (CaCO 3), showing trigonal symmetry and a great variety of mineral habits. It is one of the commonest of minerals in association with both igneous and sedimentary rocks. calcite sea A body of water in which low-magnesium calcite is the primary inorganic marine calcium carbonate ...