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Eastonite (of Winchell)

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Formula:
K
 
2
Mg
 
5
Al
 
4
Si
 
5
O
 
20
(OH)
 
4
Colour:Black
Name:From Easton, Pennsylvania
A variety of Biotite

A name for the Biotite end-member.

Classification of Eastonite (of Winchell)

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Physical Properties of Eastonite (of Winchell)

Colour:Black
Cleavage:Perfect
Perfect

Chemical Properties of Eastonite (of Winchell)

Formula:
K
 
2
Mg
 
5
Al
 
4
Si
 
5
O
 
20
(OH)
 
4
Simplified for copy/paste:K2Mg5Al4Si5O20(OH)4
Essential elements:Al, H, K, Mg, O, Si
All elements listed in formula:Al, H, K, Mg, O, Si

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Eastonite (of Winchell)

Search Engines:
  • Look for Eastonite (of Winchell) on Google
  • Look for Eastonite (of Winchell) images on Google
  • Mineral Dealers:
  • Fine Minerals from Weinrich Minerals, Inc.
  • rare and unusual minerals mainly crystallized
  • Rare and Unusual minerals at Mineralogical Research Company
  • The Arkenstone - Fine Minerals
  • Buy rare minerals from Excalibur Minerals
  • Fine and rare minerals from mintreasure.com
  • Fine minerals from bisbeeborn.com
  • Find Eastonite (of Winchell) on www.crystalclassics.co.uk
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Wilensky Fine Minerals
  • Buy minerals from YourMineralCollection
  • Fabre Minerals - search for Eastonite (of Winchell) specimens
  • Jobs:
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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