Difference between revisions of "Peridot"

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[[File:1998.569-SC8319.jpg|thumb|'''MFA Acc. #:''' 1998.569]]
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[[File:Peridot 2016391.jpg|thumb|Peridot necklace<br>MFA# 2016.391]]
 
== Description ==
 
== Description ==
 
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[[File:1998.569-SC8319.jpg|thumb|Jeweled brooch<br>MFA # 1998.569]]
 
A transparent, yellow-green [[gemstone|gemstone]]. Peridot is a transparent form of [[olivine|olivine]] that was known in ancient Greece and in Egypt. Many of the green stones worn by Cleopatra were peridot. The main old world source for peridot was the island of Zabargad (St. John's Island) in the Red Sea. Peridot was called an evening emerald because it appears to lose its yellowish cast at night. It has sometimes been misidentified as emerald and as green glass. Former names include topaz (Greek) and zerberdjet (Persian). Peridots are still obtained from Zabargad and also from Brazil (Minas Gerais), South Africa, Kenya, China, Myanmar (formerly Burma, near Mogok), Norway (Sondmore), and the U.S. (Arizona, Hawaii).
 
A transparent, yellow-green [[gemstone|gemstone]]. Peridot is a transparent form of [[olivine|olivine]] that was known in ancient Greece and in Egypt. Many of the green stones worn by Cleopatra were peridot. The main old world source for peridot was the island of Zabargad (St. John's Island) in the Red Sea. Peridot was called an evening emerald because it appears to lose its yellowish cast at night. It has sometimes been misidentified as emerald and as green glass. Former names include topaz (Greek) and zerberdjet (Persian). Peridots are still obtained from Zabargad and also from Brazil (Minas Gerais), South Africa, Kenya, China, Myanmar (formerly Burma, near Mogok), Norway (Sondmore), and the U.S. (Arizona, Hawaii).
  
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olivine; zeberdjet; evening emerald; olivine, péridot (Fr.); peridoto (Esp., Port.); Peridot (Deut.); peridoot (Ned.)
 
olivine; zeberdjet; evening emerald; olivine, péridot (Fr.); peridoto (Esp., Port.); Peridot (Deut.); peridoot (Ned.)
  
== Other Properties ==
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== Physical and Chemical Properties ==
  
 
Orthorhombic crystal system.   
 
Orthorhombic crystal system.   
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[[media:download_file_428.pdf|Properties of Common Gemstones]]
 
[[media:download_file_428.pdf|Properties of Common Gemstones]]
  
 
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== Resources and Citations ==
 
 
== Sources Checked for Data in Record ==
 
  
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 561
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 561
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* R.F.Symmes, T.T.Harding, Paul Taylor, ''Rocks, Fossils and Gems'', DK Publishing, Inc., New York City, 1997
 
* R.F.Symmes, T.T.Harding, Paul Taylor, ''Rocks, Fossils and Gems'', DK Publishing, Inc., New York City, 1997
  
* Website address 1  Comment: http://www.geo.utexas.edu/courses/347k/redesign/gem_notes/Peridot/peridot_triple_page.htm
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* Website: http://www.geo.utexas.edu/courses/347k/redesign/gem_notes/Peridot/peridot_triple_page.htm
  
 
* Yasukazu Suwa, ''Gemstones: Quality and Value, Volume 1'', Sekai Bunka Publishing Inc., Tokyo, 1999
 
* Yasukazu Suwa, ''Gemstones: Quality and Value, Volume 1'', Sekai Bunka Publishing Inc., Tokyo, 1999

Latest revision as of 08:28, 12 August 2020

Peridot necklace
MFA# 2016.391

Description

Jeweled brooch
MFA # 1998.569

A transparent, yellow-green Gemstone. Peridot is a transparent form of Olivine that was known in ancient Greece and in Egypt. Many of the green stones worn by Cleopatra were peridot. The main old world source for peridot was the island of Zabargad (St. John's Island) in the Red Sea. Peridot was called an evening emerald because it appears to lose its yellowish cast at night. It has sometimes been misidentified as emerald and as green glass. Former names include topaz (Greek) and zerberdjet (Persian). Peridots are still obtained from Zabargad and also from Brazil (Minas Gerais), South Africa, Kenya, China, Myanmar (formerly Burma, near Mogok), Norway (Sondmore), and the U.S. (Arizona, Hawaii).

Synonyms and Related Terms

olivine; zeberdjet; evening emerald; olivine, péridot (Fr.); peridoto (Esp., Port.); Peridot (Deut.); peridoot (Ned.)

Physical and Chemical Properties

Orthorhombic crystal system.

Fracture = conchoidal to uneven. Luster = vitreous. Streak = colorless.

Fluorescence = none

Composition (Mg,Fe)2SiO4
Mohs Hardness 6.5
Density 3.22-3.40
Refractive Index 1.650-1.690

Comparisons

Properties of Common Gemstones

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 561
  • Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
  • R.F.Symmes, T.T.Harding, Paul Taylor, Rocks, Fossils and Gems, DK Publishing, Inc., New York City, 1997
  • Yasukazu Suwa, Gemstones: Quality and Value, Volume 1, Sekai Bunka Publishing Inc., Tokyo, 1999
  • Michael O'Donoghue and Louise Joyner, Identification of Gemstones, Butterworth-Heinemann, Oxford, 2003

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