Difference between revisions of "Almandine"

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[[[SliderGallery rightalign|almandineRS.jpg~Raman]]]
 
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== Other Properties ==
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== Physical and Chemical Properties ==
  
 
Fracture = conchoidal.  Luster = vitreous to resinous.  Streak = colorless.  Birefringence = none.  Dispersion = 0.024.  Pleochroism = none.  UV fluorescence = inert
 
Fracture = conchoidal.  Luster = vitreous to resinous.  Streak = colorless.  Birefringence = none.  Dispersion = 0.024.  Pleochroism = none.  UV fluorescence = inert
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| 1.79-1.83
 
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== Additional Information ==
 
 
Mineralogy Database: [http://www.webmineral.com/data/Almandine.shtml Almandine]
 
  
 
== Comparisons ==
 
== Comparisons ==
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[[media:download_file_395.pdf|Properties of Gemstones]]
 
[[media:download_file_395.pdf|Properties of Gemstones]]
  
 
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== Resources and Citations ==
 
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* Mineralogy Database: [http://www.webmineral.com/data/Almandine.shtml Almandine]
== Sources Checked for Data in Record ==
 
  
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 752
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 752
  
* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: 'almandine" from Encyclopædia Britannica Premium Service.  [Accessed May 8, 2003
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* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: 'almandine" [Accessed May 8, 2003]
  
 
* C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979
 
* C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979
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* Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982
 
* Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982
  
* Wikipedia, the free encyclopedia, at http://www.wikipedia.com  Comment: http://en.wikipedia.org/wiki/Almandine (accessed June 2004)
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* Wikipedia: http://en.wikipedia.org/wiki/Almandine (accessed June 2004)
  
  
  
 
[[Category:Materials database]]
 
[[Category:Materials database]]

Latest revision as of 14:04, 11 August 2020

almandine

Description

A red Garnet composed of iron aluminum silicate. Almandine can range in color from pale violet to bright red to purplish to brownish black. It was popular as a gem in Roman times and was also commonly found in Egypt. Gemstone quality almandine is mined in Asia Minor, Sri Lanka, Australia, Alaska, Africa, Norway, Sweden, and Japan. It is frequently cut en cabochon then called carbuncle.

Synonyms and Related Terms

almandite; carbuncle; garnet; Ceylon ruby; Syrian garnet; Australian ruby; alabandicus (Pliny); Almandine (Deut.); almandino (Esp.); almandyn (Pol.); almandina (Port.); almandien (Ned.)

Raman

AlmandineRS.jpg


Physical and Chemical Properties

Fracture = conchoidal. Luster = vitreous to resinous. Streak = colorless. Birefringence = none. Dispersion = 0.024. Pleochroism = none. UV fluorescence = inert

Composition Fe3Al2Si3O12
Mohs Hardness 7.0-7.5
Density 4.05 - 4.3
Refractive Index 1.79-1.83

Comparisons

Properties of Gemstones

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 752
  • C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
  • Sue Fuller, Rocks and Minerals, DK Publishing, Inc., New York City, 1995
  • Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982