Granite: alternatives and connections

A mineral of the feldspar family, triclinic in crystallization, and in composition a silicate of alumina and soda. It is a common cons…

A mineral of the feldspar family, commonly occurring in small glassy crystals, also a constituent of some igneous rocks. It is a lime…

Mica containing iron and magnesia, generally of a black or dark green color; -- a common constituent of crystalline rocks. See Mica.

A granular mineral of a grayish or yellowish color, found in Bolton, Massachusetts. It is a silicate of magnesium, belonging to the ch…

A cryptocrystalline, translucent variety of quartz, having usually a whitish color, and a luster nearly like wax.

A fluosilicate of magnesia and iron, yellow to red in color, often occurring in granular form in a crystalline limestone.

A soft, earthy, clayey mineral, of whitish or grayish color.

The regular form which a substance tends to assume in solidifying, through the inherent power of cohesive attraction. It is bounded by…

A rock consisting of granular red garnet, light green smaragdite, and common hornblende; -- so called in reference to its beauty.

One of the simplest or essential parts or principles of which anything consists, or upon which the constitution or fundamental powers…

A finegrained rock, flintlike in fracture, consisting essentially of orthoclase feldspar with occasional grains of quartz.

To give feeble or scattered rays of light; to shine faintly; to show a faint, unsteady light; as, the glimmering dawn; a glimmering la…

A crystalline rock, consisting, like granite, of quartz, feldspar, and mica, but having these materials, especially the mica, arranged…

A whitish, granular rock, consisting of feldspar and quartz intimately mixed; -- sometimes called whitestone, and leptynite.

A crystalline rock consisting of quarts and mica, common in the tin regions of Cornwall and Saxony.

A grayish or greenish compact rock, composed of feldspar and augite, and allied to basalt.

A species of the feldspar group containing barium. See Feldspar.

A kind of feldspar commonly showing a beautiful play of colors, and hence much used for ornamental purposes. The finest specimens come…