Feldspar - Part of the Earth's Crust

Feldspar - Part of the Earth's Crust Visual Arts STEM

This image depicts a piece of feldspar.  Robert (“Rob”) Lavinsky, PhD, took this photo.  He describes it for us:

A superb, textbook feldspar crystal.  Not just is it big, but it is stark white, perched on a natural pedestal, and just an amazing display of perfection in symmetry in nature.  Ex. Franz Saller Collection of Bavaria, Germany; probably purchased in the 1980s.  The piece is pristine and complete-all-around - remarkably free of damage. 

Now ... for an overview science lesson on feldspar:

  • It’s the most-common (and most-abundant) mineral on Earth.
  • It forms when potassium gets together with aluminum, silica and oxygen molecules.
  • It covers a huge part of the Earth’s crust ... about 60%.
  • A special kind of feldspar, called labradorite, is semi-precious and has a beautiful "play of colors" (referred to as its "schiller")
  • When feldspar combines with quartz, the result is granite ... a much-harder igneous rock.
  • Granites which are pink, green or grey are those colors because of the presence of feldspar.
  • Wind and water can grind-down feldspar into bits of sand or clay.
  • The type of clay which once was feldspar - before it broke apart - is called kaolin.

There's more to know about feldspar, but that's a good start.

Media Credits

Photo by Dr. Robert Lavinsky; online, via Wikimedia Commons.  LICENSE:  CC BY-SA 3.0.




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"Feldspar - Part of the Earth's Crust" AwesomeStories.com. Oct 07, 2013. Sep 16, 2019.
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