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  • n. Plural form of feldspar.


Sorry, no etymologies found.


  • It was at this epoch that the rocks called feldspars, syenites, and porphyries appeared.

    Voyage au centre de la terre. English

  • It is home to glasses, pyroxenes, feldspars, oxides, olivines, troilite and metals in its lunar soil, which is called regolith.

    Weekend SkyWatcher's Forecast: March 19-21, 2010 | Universe Today

  • The minerals included in this group are orthoclase, microcline, and the plagioclase feldspars.


  • Many common minerals, including feldspars, contain aluminum, but extracting the metal from most minerals is very energy-intensive, and therefore expensive.


  • Of course plagioclase feldspars are also one of my favorites so I might be a little partial here.

    Archive 2008-09-01

  • In this rock, you get the recrystallization and foliation of quartz, feldspars, micas, and amphiboles into alternating light - and dark-colored bands.

    Metamorphic rock

  • All of these rock types are light in color because of the dominance of quartz, potassium and sodium feldspars, and plagioclase feldspar minerals (Figure 1).

    Igneous rock

  • GABBRO: A black,course-grained,intrusive igneous rock,composed of calcic feldspars and pryoxene.

    Think Progress » Molly Ivins hospitalized in cancer battle.

  • So far she has slate, oolitic limestone, banded sandstone with calcite cement, a few feldspar crystals though ashamedly I forgotten how to tell feldspars apart with out the add of thin sections and a microscope!

    Snell-Pym » Jean has the Geologist Blues

  • "Well, when dilational stress levels rise, microfractures open in the diorite and release trace levels of radiogenic argon from feldspars into the atmosphere."


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