feldspar

noun

feld·​spar ˈfel(d)-ˌspär How to pronounce feldspar (audio)
: any of a group of crystalline minerals that consist of aluminum silicates with either potassium, sodium, calcium, or barium and that are an essential constituent of nearly all crystalline rocks

Examples of feldspar in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Made of clay and feldspar and covered in glaze, this earthenware pottery is celebrated for its timelessness and durability. Betsy Cribb Watson, Southern Living, 4 Oct. 2024 The town’s pegmatites are composed of about 65 percent feldspar, 25 percent quartz, 8 percent mica and trace amounts of other minerals. Olatunji Osho-Williams, Smithsonian Magazine, 3 Oct. 2024 Now cooled and worn, the rocks around Spruce Pine has the look of a dirty snowball thanks to a combination of feldspar, mica, and quartz. Adam Clark Estes, Vox, 7 Dec. 2018 Consisting primarily of feldspar and quartz, aplite is formed at a late stage of the magma crystallization. Roger Naylor, The Arizona Republic, 5 Sep. 2024 See all Example Sentences for feldspar 

Word History

Etymology

modification of obsolete German Feldspath (now Feldspat), from German Feld field + obsolete German Spath (now Spat) spar

First Known Use

1772, in the meaning defined above

Time Traveler
The first known use of feldspar was in 1772

Dictionary Entries Near feldspar

Cite this Entry

“Feldspar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/feldspar. Accessed 28 Nov. 2024.

Kids Definition

feldspar

noun
feld·​spar ˈfel(d)-ˌspär How to pronounce feldspar (audio)
: any of a group of crystalline minerals that consist of silicates of aluminum with potassium, sodium, calcium, or barium and that are a basic part of nearly all crystalline rocks

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