Mindat Logo

Gummite

This page is currently not sponsored. Click here to sponsor this page.



Colour:Orange, yellow, ...Hardness:2½ - 5
Name:In allusion to the gum-like or rubber-like (rubber = gummi in German) appearance of some early material.
A Mixture Of:Boltwoodite, Clarkeite, Curite, Kasolite, Soddyite, Uraninite, Uranophane


A mixture of uraninite and secondary uranium minerals of variable composition.

Classification of Gummite

mindat.org URL:http://www.mindat.org/min-1774.html
Please feel free to link to this page.

Physical Properties of Gummite

Lustre:Vitreous, Waxy, Greasy, Dull
Diaphaneity (Transparency):Translucent
Colour:Orange, yellow, orange-red, red-brown, brown-black, black
Streak:Yellow, brownish, olive-green
Hardness (Mohs):2½ - 5
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven, Conchoidal
Density (measured):3.9 - 6.4 g/cm3

Other Names for Gummite

Synonyms:
EliasitePittiniteUranogummite
Other Languages:
Dutch:Gummiet
German:Eliasit
Fester Uranocker
Gummierz
Gummit
Lichtes Uranpecherz
Phosphor-Gummit
Phosphorogummit
Pittinit
Urangummi
Urangummit
Uranisches Gummi-Erz
Uranisches Pittin-Erz
Uranogummit
Spanish:Eliasita
Gummita
Pittinita
Uranogummita
Ukrainian:Ґуміт
Varieties:
CoraciteYttrogummite

Other Information

Health Warning:Contains uranium - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest. Avoid prolonged exposure in proximity of the body. Store away from inhabited areas.

References for Gummite

Reference List:

- +
Breithaupt (1847): 903 (as urangummi).

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 622-624.

Frondel, C. (1956) The mineralogical composition of gummite. American Mineralogist: 41: 539-568.

Internet Links for Gummite

Search Engines:
  • Look for Gummite on Google
  • Look for Gummite images on Google
  • Mineral Dealers:
  • High-end worldwide specimens & outstanding customer service
  • Buy from David K Joyce minerals
  • Rare and Unusual minerals at Mineralogical Research Company
  • Fine and rare minerals from mintreasure.com
  • Buy fine minerals and gemstones from Pala International
  • Fine minerals from bisbeeborn.com
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • The Arkenstone - Fine Minerals
  • Search for Gummite on Well-Arranged Molecules
  • Top quality minerals from Kristalle of California
  • rare and unusual minerals mainly crystallized
  • Localities for Gummite

    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.
    Mineral and/or Locality  
    Search Google  
    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.
    Current server date and time: July 4, 2014 11:24:19
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds