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Beaumontite (of Lévy)

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Formula:
(Ca,Na)5(Si27Al9)O72 · 26H2O
Colour:
Golden yellow, yellow brown
Lustre:
Vitreous, Sub-Vitreous, Pearly
Hardness:
3½ - 4
Specific Gravity:
2.2
Name:
Named in 1839 by M. Lévy in honor of Jean-Baptiste Elie de Beaumont [1798 - 1874], professor of geology at he the College de France. Beaumont co-authored the Geologic Map of France and was a researcher regarding the mechanics of mountain building. Beaumontite was re-investigated by Francis Alger in 1844 who discovered that the mineral was pseudo-orthorhombic and merely a crystallographic variant of heulandite.
A variety of Heulandite-Ca

Beaumontite differs from standard heulandite as a crystallographic variety with fewer crystal faces the result of which beumontite resembles an orthorhombic mineral with "right square prism". Most beaumontite, by coincidence, is generally golden yellow.


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Physical Properties of Beaumontite (of Lévy)Hide

Vitreous, Sub-Vitreous, Pearly
Transparency:
Transparent, Translucent
Colour:
Golden yellow, yellow brown
Streak:
White
Hardness:
3½ - 4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{001}
Fracture:
Step-Like
Density:
2.2 g/cm3 (Measured)    

Chemical Properties of Beaumontite (of Lévy)Hide

Formula:
(Ca,Na)5(Si27Al9)O72 · 26H2O

First Recorded Occurrence of Beaumontite (of Lévy)Hide

General Appearance of First Recorded Material:
Pseudo-orthorhombic equant golden yellow crystals with a pearly face.
Geological Setting of First Recorded Material:
Fissure mineralization between gneiss and granite schlieren
Associated Minerals at First Recorded Locality:

Common AssociatesHide

Associated Minerals Based on Photo Data:
Haydenite1 photo of Beaumontite (of Lévy) associated with Haydenite on mindat.org.

Fluorescence of Beaumontite (of Lévy)Hide

Not fluorescent in UV

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 Beaumontite (of Lévy)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Levy, M. (1839) L'Institute (French Academy of Science), #313, p. 455.
Alger, Francis (1844) Beaumontite and Licolnite Identical with Heulandite, American Journal of Science, first series, v. 46 , p. 233-236.

Internet Links for Beaumontite (of Lévy)Hide

Localities for Beaumontite (of Lévy)Hide

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.
USA (FRL)
 
  • Maryland
    • Baltimore City
M. Levy (1839)
Mineral and/or Locality  
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