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Odontolite

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About OdontoliteHide

Name:
From the root word for tooth in allusion to its occurrence as a replacement in fossil teeth.
Much Odontolite, or "Occidental Turquoise" is fossilized bone or teeth consisting of microcrystalline apatite.

Originally thought to be coloured by vivianite, or perhaps by copper salts, recent research has suggested that the original material was fossilized mastodon ivory found in Miocene geological layers next to the Pyrenean chain, France - which has been heated to induce the blue colour change.

The material is almost entirely fluorapatite, with traces of Fe, Mn, Ba and U. Odontolite owes its turquoise-blue color to Mn5+ ions in a distorted tetrahedral environment of four O2– ions (Reiche et al., 2001).



Visit gemdat.org for gemological information about Odontolite.


Synonyms of OdontoliteHide

Other Language Names for OdontoliteHide

Other InformationHide

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

References for OdontoliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 950.
Reiche, I. et al. (2011): From mastodon ivory to gemstone: The origin of turquoise color in odontolite. American Mineralogist 86, 1519-1524.
Chadefaux, C. et al. (2009): Color origin and heat evidence of paleontological bones: Case study of blue and gray bones from San Josecito Cave, Mexico. American Mineralogist 94, 27-33.

Internet Links for OdontoliteHide

Localities for OdontoliteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Bolivia
 
  • Oruro
    • Cercado Province
Alfredo Petrov field collected specimen.
France
 
  • Occitanie
    • Gers
Specimen in Natural History Museum, London collection
USA
 
  • Utah
    • San Juan Co.
      • La Sal Mts
        • La Sal Mining District (Paradox Valley Mining District)
Rick Dalrymple Collection
 
Mineral and/or Locality  
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