How to Use feldspar in a Sentence

feldspar

noun
  • Later the region was mined for the feldspar in the granite ledges.
    — courant.com, 12 Aug. 2019
  • One of those the-world-and-all-its-banks-are-mine skulls that looks like it’s made of feldspar and weighs a metric ton.
    — Virginia Heffernan, WIRED, 30 Mar. 2018
  • Made of feldspar porcelain, the mugs are dishwasher and microwave-safe.
    — Sophia Beams, Better Homes & Gardens, 1 Apr. 2026
  • Interestingly, orbital surveys do show more feldspar on the far side than on the near side.
    — Phil Plait, Scientific American, 19 July 2024
  • But what intrigued the researchers was that biotite and feldspar don’t occur together.
    — Roger Lewin, Discover Magazine, 11 Nov. 2019
  • With their distinctive bands and sporadic veins of quartz and feldspar, the stones sparkle whenever sunlight strikes them.
    — Dan Falk, Discover Magazine, 6 Apr. 2024
  • The vast majority of the glass was a pale green color, thanks to a composition of quartz and feldspar.
    — Marisa Sloan, Discover Magazine, 21 July 2021
  • The handmade glass is made from a mixture of sand, limestone, feldspar and other materials.
    — Christine Tannous, IndyStar, 13 Nov. 2025
  • That technique reveals how much time has elapsed since minerals such as quartz and feldspar in the sediments were last buried, Lai said.
    — Katherine Kornei, Discover Magazine, 14 Nov. 2023
  • Generations of Spruce Pine miners tossed the quartz aside in favor of the feldspar and mica.
    — Sam Farmer, Los Angeles Times, 11 Nov. 2020
  • Some are safe as inclusions in other minerals like plagioclase feldspar.
    — Erik Klemetti, Discover Magazine, 6 Dec. 2013
  • Different colors of sand come from different minerals, like khaki feldspar, smoky white quartz, green olivine or black basalt.
    — David R. Montgomery, Discover Magazine, 12 July 2024
  • Granite is a siliceous stone composed primarily of silicates, such as quartz, feldspar, and mica.
    — Caitlin Sole, Better Homes & Gardens, 4 Aug. 2022
  • The sand reflects the rocky outcrops found inland and along the coast and is composed mostly of grains of quartz, feldspar, limestone and fragmented shells.
    — David Bressan, Forbes, 27 Apr. 2021
  • 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
  • Rhyolitic lava is felsic; the name is derived from feldspar and silica, which are present in high concentrations.
    — Gemma Tarlach, Discover Magazine, 24 Nov. 2015
  • Slate, along with sandstone, quartzite, soapstone and granite, is in the other big group, with stones composed mostly of silicates, such as quartz and feldspar.
    — Jeanne Huber, Washington Post, 26 May 2023
  • The countertop has quartz, plagioclase feldspar, potassium feldspar and biotite?
    — Erik Klemetti, Discover Magazine, 25 Mar. 2025
  • Large plagioclase feldspar crystals can be seen below the hornblende, all embedded in a matrix of volcanic glass and feldspar crystals.
    — Erik Klemetti, Discover Magazine, 25 Mar. 2025
  • Generally porcelain dinnerware is made from Kaolin clay and feldspar stone that is baked at very high temperatures in an oven called a kiln.
    — Tom Mylan, Bon Appétit, 26 Feb. 2025
  • Unlike Magnifique’s completely clay pot, however, these stoneware crocks are glazed in a silicate made of a blend of quartz, feldspar, and clay.
    — Callie Sumlin, Bon Appetit Magazine, 3 Apr. 2026
  • Oregon sunstone’s feldspar crystals are found in soil and prehistoric lava flows in Lake and Harney counties.
    — oregonlive, 2 Mar. 2023
  • Granite is a natural stone composed primarily of silicates, such as quartz, feldspar, and mica.
    — Caitlin Sole, Better Homes & Gardens, 25 Feb. 2026
  • Granite is a natural stone composed primarily of silicates, such as quartz, feldspar, and mica.
    — Caitlin Sole, Better Homes & Gardens, 28 Nov. 2025
  • Made of clay and feldspar and covered in glaze, this earthenware pottery is celebrated for its timelessness and durability.
    — Betsy Cribb Watson, Southern Living, 5 Feb. 2025
  • Made of clay and feldspar and covered in glaze, this earthenware pottery is celebrated for its timelessness and durability.
    — Betsy Cribb Watson, Southern Living, 7 Feb. 2026
  • Basalt is the most common rock on Earth, formed directly by crystallization of feldspar, pyroxen, olivine and quartz from a magma rich in iron and silica.
    — David Bressan, Forbes, 10 Mar. 2021
  • Bauxite is a complex mix of the minerals gibbsite, boehmite, and diaspore, formed as less stable minerals like feldspar and mica react with water.
    — David Bressan, Forbes, 31 Dec. 2022
  • Tiny quartz and feldspar crystals, no bigger than a human hair, that carried microscopic planar deformation features.
    — Rupendra Brahambhatt, Interesting Engineering, 21 Sep. 2025

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'feldspar.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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