orthoclase

IPA: ˈɔrθʌkɫeɪs

(mineralogy) Potassium aluminum silicate, KAlSi₃O₈, a common feldspar of igneous, plutonic, and metamorphic rocks. Orthoclase is the main feldspar of pegmatite occurrences, where it is most commonly flesh-colored. Orthoclase is used in the ceramic and glass industries and as a decorative gravel.

Examples of "orthoclase" in Sentences

In this way I have melted beryl, orthoclase, and quartz.
Other kinds of felspar, even orthoclase, may however also show the aventurine appearance.
(K2O · Al2O3 ·6SiO2), exists as minerals named orthoclase and microcline, melting at 1200°C.
(Common orthoclase feldspar, which is frequently of a brownish pink or flesh color, will do.)
The minerals included in this group are orthoclase, microcline, and the plagioclase feldspars.
A pomegranate is not a species of granular crystalline rock consisting essentially of quartz, orthoclase-feldspar, and mica, as I spelled it.
It occurs as nitrate in nitre (KNO_ {3}), and as silicate in many minerals, such as orthoclase (or potash-felspar) and muscovite (or potash-mica).
Those yielded by orthoclase must generally abound in potash, while albite and labradorite, containing little or none of that element, must produce soils in which it is deficient.
Granite is a mixture of quartz, felspar, and mica in variable proportions, and the quality of the soil it yields depends on whether the variety of felspar present be orthoclase or albite.
There are, for instance, several different minerals commonly classified under the name of felspar, which have been distinguished by mineralogists by the names of orthoclase, albite, oligoclase, and labradorite; and there are at least two sorts of mica, two of hornblende, and many varieties of zeolites.