When used as a count noun, a culture is the set of customs, traditions, and values of a society or community, such as an ethnic group or nation. In this sense, multiculturalism is a concept that values the peaceful coexistence and mutual respect between different cultures inhabiting the same territory.
orthoclase. n. 1. (Minerals) a white to pale yellow, red, or green mineral of the feldspar group, found in igneous, sedimentary, and metamorphic rocks.It is used in the manufacture of glass and ceramics. Composition: potassium aluminium silicate.Formula: KAlSi3O8.rÂ·thoÂ·clase. A type of feldspar consisting of potassium aluminum silicate. Orthoclase is typically white, pink, yellow, or brown, but it can also be colorless. It is especially common in igneous rocks.
Feldspar isnât really a mineral, itâs a class of minerals, comprising a range of compositions. Likewise, the term plagioclase is a subclass, comprising a yet smaller range of compositions. There is a lot of variability in feldspars. Here is a more formal treatment: Feldspars are aluminosilicates.