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Ruby

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Formula:
Al
 
2
O
 
3
Colour:RedHardness:9
A variety of Corundum

A red, gem variety of corundum. The red colour is caused by minor amounts of trivalent Cr replacing Al in the crystal structure.

In traditional gemmological terms, ruby has to be blood-red and of clear, facetable quality to justify the name, however in wider usage any corundum with a red or reddish colour has attracted the name 'ruby', and this name is usually applied in this way by mineral collectors.

Pink corundum is usually referred to in gemmological terminology as pink sapphire rather than ruby.

Pure Cr2O3 occurs in nature as the mineral eskolaite which is green.

Visit gemdat.org for gemological information about Ruby. Currently in public beta-test.

Classification of Ruby

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Physical Properties of Ruby

Colour:Red
Hardness (Mohs):9

Chemical Properties of Ruby

Formula:
Al
 
2
O
 
3
Simplified for copy/paste:Al2O3
Essential elements:Al, O
All elements listed in formula:Al, O

Other Names for Ruby

Synonyms:
Oriental Ruby
Other Languages:
Arabic:ياقوت
Basque:Errubi
Bulgarian:Рубин
Czech:Rubín
Danish:Rubin
Dutch:Robijn
Esperanto:Rubeno
Estonian:Rubiin
Finnish:Rubiini
French:Rubis
Galician:Rubí
German:Rubin
Hebrew:אודם
רובי
Indonesian:Rubi
Italian:Rubino
Japanese:ルビー
Korean:루비
Latvian:Rubīns
Lithuanian:Rubinas
Norwegian (Bokmål):Rubin
Persian:یاقوت
Polish:Rubin
Portuguese:Rubin
Romanian:Rubin
Russian:Рубин
Serbian (Cyrillic Script):Рубин
Simplified Chinese:红宝石
Slovak:Rubín
Slovenian:Rubin
Spanish:Rubí
Swedish:Rubin
Telugu:కెంపు
Thai:ทับทิม
Traditional Chinese:紅寶石
Turkish:Yakut
Ukrainian:Рубін
Vietnamese:Hồng ngọc
Varieties:
BarklyiteStar RubyTrapiche ruby

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 Ruby

Search Engines:
  • Look for Ruby on Google
  • Look for Ruby images on Google
  • Mineral Dealers:
  • Search for Ruby on Well-Arranged Molecules
  • rare and unusual minerals mainly crystallized
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Buy rare minerals from Excalibur Minerals
  • Buy from McDougall Minerals
  • Rare and Unusual minerals at Mineralogical Research Company
  • Top quality minerals from Kristalle of California
  • Buy from Dave Bunk Minerals
  • Buy from David K Joyce minerals
  • Fine minerals from bisbeeborn.com
  • Lapis Mineral Magazin
  • Fine and rare minerals from mintreasure.com
  • Specimens:The following Ruby specimens are currently listed for sale on minfind.com.

    Localities for Ruby

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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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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