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


Tanzanite
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
Vredefort Impact Crater
The Vredefort Crater is the largest and 2nd oldest impact crater visible on Earth.
gem photos
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Mars Meteorites
Mars Meteorites: Interesting iron meteorites found on Mars by NASA rovers.
Great Rift Valley
The East Africa Rift System: Learn about the complex East Africa Rift Valley system.
What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
Is Water a Mineral?
Are Water and Ice Minerals? Comparing their properties with the definition of a mineral.
Debris Flows
Debris Flows are moving masses of loose mud, sand, soil, rock and water.


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




More Minerals
  Minerals
  Fluorescent Minerals
  Mineral Identification Chart
  Quartz
  Diamond
  Find Minerals and Gems
  United States Gemstones
  Tucson Gem & Mineral Show




© 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.