McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams

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


bear attack
Bear Attacks! Knowing how to react to a bear encounter and attack could save your life.
rocks
Rock Gallery: Photos of igneous, sedimentary and metamorphic rocks.
Deepest Point in the Ocean
Deepest Point in the Ocean: The deepest point in the ocean is in the Mariana Trench.
Ametrine
Ametrine is a bicolor quartz (amethyst + citrine) and a gemstone of growing popularity.
Corundum
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
Turritella Agate
Turritella Agate is a brown agate containing snail fossils from the Green River Formation.
Olivine
Olivine is a rock-forming mineral found in the crust, the mantle, and in some meteorites.
Green River Formation
The Green River Formation is one of the most famous rock units in the world for its fossils.


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




More Minerals
  Minerals
  Quartz
  Mineral Identification Chart
  Fluorescent Minerals
  Mohs Hardness Scale
  Corundum
  Find Minerals and Gems
  United States Gemstones




© 2005-2015 Geology.com. All Rights Reserved.
Images, code and content of this website are property of Geology.com. Use without permission is prohibited. Pages on this site are protected by Copyscape.