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Quartz ("KWARTZ") 

We sometimes find large chunks of pure quartz in our neighborhood.  Most of them seem to have broken out of a type of rock called pegmatite.

To learn more about quartz, scroll farther down this page.

Big chunks of quartz
Crushed pegmatite rock, the source of most of the large chunks of quartz in our neighborhood.
  
bulletHow to recognize quartz 
bulletOther names for quartz
 

How to recognize quartz

bulletThis form of quartz is cloudy white, a bit pinkish, or clear.
bulletBroken crystals look a bit like broken glass
bulletYou cannot scratch quartz with a nail or knife.  (See more about the scratch test.)
bulletAlso, quartz does not bubble in vinegar or acid.

  

Other names for quartz

Other names for this type of quartz:

bulletWhitish quartz is called "Milky Quartz," and pink quartz is called "Rose Quartz."
  
bulletBig chunks of quartz are sometimes called "Bull Quartz."
  
bulletWe found lots of large quartz crystals in 50-pound bags of pegmatite gravel sold as "Royal Gorge."
    
Here are some ways to classify quartz (by grouping it with similar types of materials):
 
bulletQuartz is a mineral.
 
bulletThe type of quartz that we found formed as part of an igneous rock, called pegmatite.
 
bulletPegmatite is an intrusive igneous rock, because it formed as melted rock cooled slowly, deep under the Earth's surface.

  
To learn more about this type of quartz, please 
go to our page on pegmatite rock.

  


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Copyright 2001-2002 Eric D. Gyllenhaal                                          Search this Site
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This page was created on May 2, 2001, and it was last updated on July 27, 2002.