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  2. Brownstone - Wikipedia

    en.wikipedia.org/wiki/Brownstone

    Brownstone is a brown Triassic–Jurassic [1] [2] sandstone that was historically a popular building material. The term is also used in the United States and Canada to refer to a townhouse clad in this or any other aesthetically similar material.

  3. List of quarries in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_quarries_in_the...

    Portland Brownstone Quarries, Portland, Connecticut, NRHP-listed, source of much of the brownstone used in New York City, Boston, Philadelphia; Luman Andrews House, Southington, Connecticut, NRHP-listed. Identified in 1825 to be a site of blue limestone, suitable for making Portland cement, which previously had to be imported from England

  4. Carnelian - Wikipedia

    en.wikipedia.org/wiki/Carnelian

    Carnelian (also spelled cornelian) [3] is a brownish-red mineral commonly used as a semiprecious stone.Similar to carnelian is sard, which is generally harder and darker; the difference is not rigidly defined, and the two names are often used interchangeably.

  5. Brownstone (group) - Wikipedia

    en.wikipedia.org/wiki/Brownstone_(group)

    Brownstone is an American female contemporary R&B group that was popular during the mid-1990s. They are best known for their 1994 hit single " If You Love Me ", which was nominated for a Best R&B Performance Grammy Award .

  6. List of rock types - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_types

    The following is a list of rock types recognized by geologists.There is no agreed number of specific types of rock. Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe a rock type.

  7. Hummelstown brownstone - Wikipedia

    en.wikipedia.org/wiki/Hummelstown_brownstone

    Hummelstown brownstone is a medium-grain, dense sandstone quarried near Hummelstown in Dauphin County, Pennsylvania, USA. It is a dark brownstone with reddish to purplish hues, and was once widely used as a building stone in the United States.