Home » Minerals » Glauconite

Glauconite


Mineral Properties and Uses



Physical Properties of Glauconite

Chemical Classification silicate
Color green, blue green
Streak dull green
Luster earthy to dull
Diaphaneity transparent to translucent
Cleavage perfect
Mohs Hardness 2
Specific Gravity 2.4 to 3.0
Diagnostic Properties color
Chemical Composition (K,Na)(Fe3+,Al,Mg)2((Si,Al)4O10)(OH)2
Crystal System monoclinic
Uses fertilizer, soil amendment


Glauconite in sandstone
This is glauconite in sandstone from Afton, Minnesota. Specimen is approximately 3-1/2 inches (8.9 centimeters) across.




Find it on Geology.com




More from Geology.com


Geologist Tools
Geologist Tools: Visit our store for a large selection of field and laboratory tools.
Quartzite
Quartzite: a nonfoliated metamorphic rock composed almost entirely of quartz.
gem photos
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Asteroid Impact Map
Asteroid Impact Map: Explore fifty of the most obvious asteroid impact craters on Earth.
Aventurine
Aventurine is translucent quartz with tiny reflective inclusions that produce aventurescence.
Plate Tectoncs
Zoom in on Plate Boundaries: See the details of plate tectonics in satellite view.
Tumbled Stones
Tumbled Stones: A bag of tumbled stones is like a colorful rock collection.
Geodes
Geodes look like ordinary rocks on the outside but can be spectacular inside!


Glauconite
Glauconite, or greensand, from Birmingham, New Jersey. These specimens are small particles 1 to 2 millimeters across.




More Minerals
  Diamond
  Rock, Mineral and Fossil Collections.
  Minerals
  Quartz
  Fluorescent Minerals
  Calcite
  Topaz
  Mineral Identification Chart






© 2005-2017 Geology.com. All Rights Reserved.
Images, code, and content on this website are property of Geology.com and are protected by copyright law.
Geology.com does not grant permission for any use, republication, or redistribution.