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⇱ Hiddenite: Mineral information, data and localities.

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Hiddenite

A variety of Spodumene
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About HiddeniteHide

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Formula:
LiAlSi2O6
Colour:
Green
Name:
Named in 1881 by Joseph Lawrence Smith in honor of William Earl Hidden [February 16, 1853 Providence Rhode Island, USA - June 12, 1918 Newark, New Jersey, USA], mining engineer, mineral collector, and mineral dealer. Hidden was co-namer of mackintoshite in 1893. The town of Hiddenite was named after the mineral variety in 1913.
Hiddenite was not originally defined by Kunz as has been sometimes claimed. Smith (1881) did state: "I have employed all the necessary care in examining for chromium, but have found no indication of its presence." Smith tried to verify the presence of vanadium, but could only conclude that his qualitative results would have been similar to either vanadium or chromium. Smith does indicate that his hiddenite varied from pale green to emerald green, "though the color is not so intense as in the finest variety of the latter gem."
Claffy (1953) provided some information on absorption spectra.

Colorless or yellow spodumene should not be referred to as hiddenite. Green spodumene that is photosensitive and not permanently color stable is not hiddenite.

The mineral variety hiddenite was originally described from Alexander Co., North Carolina, USA. The area where hiddenite was found was governed by county government and was then known as an informal settlement called "White Plains". The town name "Hiddenite" was not granted a charter until 1913, thirty years after the naming of the mineral variety hiddenite.




Unique IdentifiersHide

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Mindat ID:
7740 (as Hiddenite)
3733 (as Spodumene)
Long-form identifier:
mindat:1:1:7740:4 (as Hiddenite)
mindat:1:1:3733:0 (as Spodumene)

Similar NamesHide

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HaydenitA synonym of Chabazite
HaydeniteA variety of Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
HeaddeniteA synonym of Arrojadite-(KFe){KNa}{Fe2+◻}{Ca}{Na2◻}{Fe132+}{Al}(PO4)11(HPO4)(OH)2

Physical Properties of HiddeniteHide

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Colour:
Green

Chemistry of HiddeniteHide

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Mindat Formula:
LiAlSi2O6
Element Weights:
Element% weight
O51.586 %
Si30.185 %
Al14.499 %
Li3.730 %

Calculated from ideal end-member formula.

Synonyms of HiddeniteHide

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Other Language Names for HiddeniteHide

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German:Hiddenit
Spanish:Hiddenita

Common AssociatesHide

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Associated Minerals Based on Photo Data:
7 photos of Hiddenite associated with QuartzSiO2
4 photos of Hiddenite associated with SpodumeneLiAlSi2O6
3 photos of Hiddenite associated with 'Kunzite'LiAlSi2O6
2 photos of Hiddenite associated with SideriteFeCO3
2 photos of Hiddenite associated with 'Smoky Quartz'SiO2
2 photos of Hiddenite associated with SchorlNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
2 photos of Hiddenite associated with BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
2 photos of Hiddenite associated with RutileTiO2
1 photo of Hiddenite associated with OrthoclaseK(AlSi3O8)
1 photo of Hiddenite associated with Apatite Group

Other InformationHide

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Health Risks:
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 HiddeniteHide

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mindat.org URL:
https://www.mindat.org/min-7740.html
Please feel free to link to this page.

References for HiddeniteHide

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Reference List:

Localities for HiddeniteHide

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Showing 23 localities.

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

Locality ListHide

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👁 Image
- This locality has map coordinates listed. 👁 Image
- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 👁 Image
- Good crystals or important locality for species. 👁 Image
- 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Afghanistan
Jose Zendrera Collection
Brazil
Mason (1976)
    • Conselheiro Pena
      • Barra do Cuieté
Natural History Museum Vienna collection (gift from Wilhelm Niemetz)
Bauer et al. (1983)
China
  • Xinjiang
    • Ili Kazakh Autonomous Prefecture
      • Altay Prefecture (Aletai Prefecture)
        • Fuyun Co. (Koktokay Co.)
www.smartminerals.com (2004)
Finland
  • South Ostrobothnia
    • Seinäjoki
      • Peräseinäjoki
Vilpas (1995)
Madagascar
  • Amoron'i Mania
    • Ambatofinandrahana District
      • Mandrosonoro
        • Ambatovita
www.geminterest.com (n.d.)
  • Vakinankaratra
    • Antsirabe II District
      • Ibity
        • Sahatany Valley
Larsen (2003)
Romania
  • Sibiu County
    • Lotru-Cibin Mountains
Călin et al. (2025)
Sri Lanka
  • Sabaragamuwa Province
    • Ratnapura District
      • Ratnapura
Ceylon Aluvial Mine (Book, Co. 2002)
  • Uva Province
    • Monaragala District
Dissanayake et al. (2000)
USA
  • California
    • San Diego County
      • Pala Mining District
        • Pala
Jahns et al. (1951)
  • New Hampshire
    • Cheshire County
      • Alstead
Meyers et al. (1956)
  • North Carolina
    • Alexander County
Palache et al. (1930)
USGS +1 other reference
Rocks & Min.:60:84.
- (2005)
Rocks & Minerals 79:5 p 344 +2 other references
- (2005)
Wilson et al. (2001)
Kunz (1907) +1 other reference
  • South Dakota
    • Custer County
      • Custer Mining District
        • Fourmile
Roberts et al. (1965)
Quick NavTopAbout HiddeniteUnique IdentifiersSimilar NamesPhysical Properties Chemistry SynonymsOther LanguagesCommon AssociatesOther InformationInternet Links References Localities Locality List
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