Difference between revisions of "Celadonite"

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== Description ==
 
== Description ==
 
[[File:celadonite C100x.jpg|thumb|Green earth (celadonite)]]
 
[[File:celadonite C100x.jpg|thumb|Green earth (celadonite)]]
A soft, gray-green, iron silicate mineral.  Celadonite was first described in 1847 on Mr. Baldo near Verona, Italy.  It is a [[mica]] type mineral that has been found as a [[pigment]] in some Chinese and Indian paintings.  
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A soft, gray-green, iron silicate mineral.  Celadonite was first described in 1847 on Mr. Baldo near Verona, Italy.  The [[mica]] type mineral has been found as a [[pigment]] in some Chinese and Indian paintings. It is one of two green silicate minerals that are commonly called [[green earth]].  The other is [[Glauconite]].
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
  
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==Physical and Chemical Properties==
 
==Physical and Chemical Properties==
  
{| class="wikitable"
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* Composition = K(Mg,Fe2+)(Fe3+,Al)[Si4O10](OH)2
|-
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* Mohs Hardness = 2
! scope="row"| Composition
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* Density = 2.5-2.7 g/ml
| K(Mg,Fe2+)(Fe3+,Al)[Si4O10](OH)2
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* Refractive Index = 1.62
|-
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* Crystal = monoclinic
! scope="row"| Mohs Hardness
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* Cleavage = perfect
| 2
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* Luster = waxy to dull
|-
 
! scope="row"| Density
 
| 2.5-2.7 g/ml
 
|-
 
! scope="row"| Refractive Index
 
| 1.62
 
|}
 
  
 
== Additional Images ==
 
== Additional Images ==

Revision as of 11:02, 12 March 2025

Celadonite

Description

Green earth (celadonite)

A soft, gray-green, iron silicate mineral. Celadonite was first described in 1847 on Mr. Baldo near Verona, Italy. The Mica type mineral has been found as a Pigment in some Chinese and Indian paintings. It is one of two green silicate minerals that are commonly called Green earth. The other is Glauconite.

Synonyms and Related Terms

green earth; celadonita (Esp.); Seladonit (Deut.), Celadonit (Deut.); céladonite (Fr.); seladonitis (Gr.); celadonite (It., Port.); terra verde (It.); groene aarde (Ned.)

Physical and Chemical Properties

  • Composition = K(Mg,Fe2+)(Fe3+,Al)[Si4O10](OH)2
  • Mohs Hardness = 2
  • Density = 2.5-2.7 g/ml
  • Refractive Index = 1.62
  • Crystal = monoclinic
  • Cleavage = perfect
  • Luster = waxy to dull

Additional Images

Resources and Citations

  • R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966 Comment: density 2.5-2.7 and ref.index.1.62
  • Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998

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