perthite

[pur-thahyt]

noun

Mineralogy.

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

Other Word Forms

• perthitic adjective
• perthitically adverb

Word History and Origins

Origin of perthite¹

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

Example Sentences

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