Quartzite: alternatives and connections

A variety of trap or basaltic rock, containing small cavities, occupied, wholly or in part, by nodules or geodes of different minerals…

Native sulphate of barium, a mineral occurring in transparent, colorless, white to yellow crystals (generally tabular), also in granul…

A mineral of a white or gray color, occurring massive or crystallized. It is a compound of the carbonates of barium and calcium.

(geology) a stratum of rock (especially sedimentary rock); "they found a bed of sandstone"

A mineral of a white or gray color occurring massive and in isometric crystals; in composition it is a magnesium borate with magnesium…

A mineral of a steel-gray to black color and metallic luster, occurring crystallized, often in twin crystals shaped like cogwheels (wh…

A yellow or smoky brown variety of rock crystal, or crystallized quartz, found esp, in the mountain of Cairngorm, in Scotland.

A mineral occurring in hexagonal crystals, also massive, generally of a yellow color, containing silica, alumina, lime, soda, and carb…

Native tin dioxide; tin stone; a mineral occurring in tetragonal crystals of reddish brown color, and brilliant adamantine luster; als…

An impure, massive, flintlike quartz or hornstone, of a dull color.

Fragmental; made up of brok/ fragments; as, sandstone is a clastic rock.

The material of quartz, in crystallization transparent or nearly so, and either colorless or slightly tinged with gray, or the like; -…

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

A massive, somewhat impure variety of quartz, in color usually of a gray to brown or nearly black, breaking with a conchoidal fracture…

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

A genus of long, slender, nematoid worms, parasitic in insects until near maturity, when they leave the insect, and live in water, in…

To pass by degrees; to change gradually; to shade off; as, sandstone which graduates into gneiss; carnelian sometimes graduates into q…

A crystalline, granular rock, consisting of quartz, feldspar, and mica, and usually of a whitish, grayish, or flesh-red color. It diff…