perthite

American

[pur-thahyt] / ˈpɜr θaɪt /

noun

Mineralogy.

a variety of feldspar containing irregular bands of albite in microcline.

Other Word Forms

perthitic adjective
perthitically adverb

Etymology

Origin of perthite

1832; named after Perth, Ontario, Canada; -ite ¹

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Among the assortment were garnets from the Stikine River and also from the Province of Quebec; amethysts from Thunder Bay; labradorite, finest in the world, from the Isle of St. Paul; spinel from Ottawa County, Quebec; sodalite from British Columbia; pitanite, Litchfield, Quebec; lercon and perthite from Quebec; sunstone and lebra stone from Perth, Ontario, and crown sunstone from Renfrew County, Ontario.

From Project Gutenberg

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023