Gummite
A mixture of two or more distinct mineral species
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About Gummite
Colour:
Orange, yellow, orange-red, red-brown, brown-black, black
Lustre:
Vitreous, Waxy, Greasy, Dull
Hardness:
2½ - 5
Specific Gravity:
3.9 - 6.4
Name:
In allusion to the gum-like or rubber-like (rubber = gummi in German) appearance of some early material.
A mixture of uraninite and secondary uranium minerals of variable composition.
Unique Identifiers
Mindat ID:
1774
Long-form identifier:
mindat:1:1:1774:5
Similar Names
| Gummite (of Breithaupt) | A synonym of Halloysite |
| Kmaite | A synonym of Celadonite |
Pronunciation of Gummite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Gummite
Vitreous, Waxy, Greasy, Dull
Transparency:
Translucent
Colour:
Orange, yellow, orange-red, red-brown, brown-black, black
Streak:
Yellow, brownish, olive-green
Hardness:
2½ - 5 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Conchoidal
Density:
3.9 - 6.4 g/cm3 (Measured)
Synonyms of Gummite
Other Language Names for Gummite
Varieties of Gummite
| Coracite | Probably uraninite partly altered to gummite. |
| Yttrogummite | A yttrium (REE)-bearing variety of gummite. Contains relatively large amounts of the yttrium earths. A alteration product of yttrian uraninite. |
Common Associates
Associations Based on Photo Data:
| 140 photos of Gummite associated with Uraninite | UO2 |
| 37 photos of Gummite associated with Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| 23 photos of Gummite associated with Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
| 23 photos of Gummite associated with Muscovite | KAl2(AlSi3O10)(OH)2 |
| 23 photos of Gummite associated with Clarkeite | (Na,Ca,Pb)(UO2)O(OH) · 0-1H2O |
| 22 photos of Gummite associated with 'Pitchblende' | UO2 |
| 21 photos of Gummite associated with 'Cyrtolite' | Zr[(SiO4),(OH)4] |
| 13 photos of Gummite associated with Zircon | Zr(SiO4) |
| 8 photos of Gummite associated with Microcline | K(AlSi3O8) |
| 8 photos of Gummite associated with Parauranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
Other Information
Health Risks:
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.
Internet Links for Gummite
mindat.org URL:
https://www.mindat.org/min-1774.html
Please feel free to link to this page.
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References for Gummite
Reference List:
Localities for Gummite
Showing 311 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Algeria | |
| infcis.iaea.org (2026) |
| infcis.iaea.org (2026) | |
Argentina | |
| Victorio Angelelli (1958) +1 other reference |
| Victorio Angelelli (1958) |
| Victorio Angelelli (1958) | |
| Victorio Angelelli (1958) |
| American Mineralogist: 46: 12-25. | |
| Blasón et al. (Ed. E. O. Zappettini) |
| GALLISKI (1983) |
| Victorio Angelelii (1958) |
| Raúl Jorge Tauber Larry +1 other reference | |
| María Elena SAULNIER y Orqídea ... |
| Raul Tauber Larry collection |
Australia | |
| R.E Brown and W.J Stroud |
| Giblin (2005) |
| Lawrence L.J. et al. Econ Geol. 52 |
| South Australian Museum collections / ... +3 other references |
| SA Geodata Database - Mineral Deposit ... |
| Coats & Blissets 1971 Bull 43 +1 other reference | |
| |
| SA Geodata Database - Mineral Deposit ... |
| |
| 1983 | |
| Bottrill et al. (2008) |
Austria | |
| Niedermayr et al. (1995) |
| Meixner (1952) +1 other reference |
Brazil | |
| Cassedanne et al. (1999) |
Canada | |
| Montgomery (n.d.) |
| Manitoba MINERAL INVENTORY FILE NO. 502 |
| Manitoba MINERAL INVENTORY FILE NO. 503 | |
| Manitoba MINERAL INVENTORY FILE NO. 065 | |
| Manitoba MINERAL INVENTORY FILE NO. 242 | |
| Manitoba MINERAL INVENTORY FILE NO. 057 | |
| |
| Lang (1952) |
| Johnston (1915) |
| Robertson (1976) |
| Ontario Geological Survey Miscellaneous ... +1 other reference |
| Ellsworth et al. (1934) |
| Rocks & Min. 40 (7) |
| Hugh S. Spence (1930) |
| Ng et al. (2013) |
| Jeremy Zolan |
| Tremblay (1978) | |
| Rich et al. (1977) |
| Tremblay (1978) | |
Chile | |
| C. Ruiz Fuller/F. Peebles (1988) |
| C. Ruiz Fuller/F. Peebles (1988) | |
China | |
| Yang et al. (2017) |
| Dahlkamp (2009) |
Czech Republic | |
| Reuss (1859) |
| Plášil et al. (2009) |
| Viktor Goliáš et al. (2016) |
DR Congo | |
| www-pub.iaea.org (2023) |
| Gécamines (1977) |
| Lhoest (1992) |
Egypt | |
| El-Naby (2009) |
| [var: Yttrogummite] Shalan (2021) |
| Hussein et al. (1988) | |
Finland | |
| en.gtk.fi (2010) |
France | |
| J.-J. Périchaud: "Les Minéraux ... |
| J.-J. Périchaud: Les Minéraux d'Auvergne et al. (1986) |
| J.-J. Périchaud: "Où trouver les minéraux d'Auvergne" et al. (Clermont-Ferrand) |
| |
| Chollet Pascal Collection |
| OLLIC Pascal Collection +1 other reference |
| OLLIC Pascal Collection |
| ... |
| Schillinger et al. (2001) |
| Benjamin Carballo Collection |
| ... |
| Pierrot et al. (1973) |
| Pierrot et al. (1973) |
| Pierrot et al. (1973) |
| R. Pierrot |
| R. Pierrot | |
| R. Pierrot | |
| [var: Coracite] R. Pierrot |
| R. Pierrot |
| R. Pierrot | |
| R. Pierrot | |
| R. Pierrot | |
| R. Pierrot | |
| R. Pierrot | |
| R. Pierrot |
| R. Pierrot | |
| [var: Coracite] R. Pierrot | |
| R. Pierrot | |
| R. Pierrot |
| R. Pierrot |
| [var: Coracite] R. Pierrot |
| R. Pierrot |
| [var: Coracite] R. Pierrot | |
| R. Pierrot | |
| J. Chervet |
| AFM 1-2002 |
| perso.wanadoo.fr (2004) |
| - (1998) | |
| - (1998) |
| - (1998) | |
| |
| Econ Geol (1997) |
| [var: Coracite] |
| - (1998) |
| - (1998) |
| J. Geffroy |
| R. Pierrot |
Germany | |
| Falkenstein (2010) |
| DILL et al. (1986) |
| Dreyer et al. (1971) |
| Hofmann (1992) |
| Stark (2011) |
| Massanek et al. (2005) |
| Gröbner et al. (2007) +1 other reference |
India | |
| Panneerselvam et al. (2002) |
| Tilak et al. (1963, January) |
| Raju et al. (2003) |
Italy | |
| De Vivo et al. (1980) +1 other reference |
| Ravagnani (1974) |
| Ravagnani (1974) |
| Ravagnani (1974) |
| . Ravagnani - I giacimenti uraniferi ... |
| Maglia (1972) +1 other reference |
| Stara (1990) |
| Daniele Ravagnani - I giacimenti ... |
Japan | |
| [var: Yttrogummite] King (n.d.) |
| [var: Yttrogummite] Alfredo Petrov specimen (ex-Kotaro Watanabe collection) |
Madagascar | |
| Behier (1963) |
| Behier (1960) | |
| Behier (1963) | |
| Behier (1963) |
Morocco | |
| Favreau (2012) |
Namibia | |
| von Bezing (2007) |
| Rio Tinto Group | |
New Zealand | |
| Cohen et al. (1967) |
Norway | |
| [var: Yttrogummite] Nordenskiöld (1878) |
| |
| Knut Eldjarn Collection |
| Bjørlykke (1939) |
| - (n.d.) |
| Larsen (2025) | |
| Larsen et al. (2016) |
Peru | |
| Li (2016) |
Poland | |
| Mochnacka et al. (2012) |
| Mochnacka et al. (2000) |
| Banaś 1970: Wstępne dane o ... +1 other reference |
| Lis et al. (1986) | |
| Mochnacka et al. (2000) | |
| Lis et al. (1986) | |
| Traube (1888) | |
| Mochnacka et al. (2000) +1 other reference | |
| Mochnacka et al. (2000) +1 other reference | |
| Mochnacka et al. (2015) |
| pl.wikipedia.org (2006) |
| Mochnacka et al. (2000) |
| Syczewski et al. (2023) | |
| Lis et al. (1986) |
Portugal | |
| LNEG - Laboratório Nacional de Energia ... |
| LNEG - Siorminp database information |
| LNEG - Laboratório Nacional de Energia ... |
| LNEG/Siorminp ID 1306U |
| LNEG FILES |
| LNEG - Laboratório Nacional de Energia ... |
| |
| |
| LNEG - Laboratório Nacional de Energia ... |
| LNEG - Laboratório Nacional de Energia ... | |
Russia | |
| Izbrodin et al. (2011) |
| Pavel M. Kartashov (n.d.) |
| Pavel M. Kartashov (n.d.) | |
Rwanda | |
| Bertossa (1968) +1 other reference |
Slovenia | |
| Dolenec (1985) |
South Africa | |
| Von Backstroem (1973) +1 other reference |
Spain | |
| Both et al. (1994) |
| Mata i Perelló (1990) |
Switzerland | |
| De Quervain (1965) |
UK | |
| Alysson Rowan collection |
USA | |
| - (2008) |
| - (2008) | |
| - (2008) +1 other reference |
| Galbraith (1959) +1 other reference |
| Bollin et al. (1958) |
| Robinson (1955) +1 other reference |
| Walker et al. (1956) +2 other references |
| MacKevett et al. (1960) +1 other reference |
| Anonymous (1954) +1 other reference |
| Walker et al. (1956) +1 other reference |
| Walker et al. (1956) +2 other references |
| Walker et al. (1956) +1 other reference |
| Nevada Bureau of Mines and Geology NBMG ... |
| Murdoch (1966) |
| Eckel et al. (1997) |
| Eckel et al. (1997) |
| Eckel et al. (1997) |
| Hanley et al. (1950) +1 other reference |
| Hanley et al. (1950) +1 other reference | |
| Meeves et al. (1966) | |
| Eckel et al. (1997) | |
| Eckel et al. (1997) |
| Eckel et al. (1997) +1 other reference | |
| Eckel et al. (1997) |
| Eckel et al. (1997) | |
| Januzzi et al. (1976) |
| J. Zolan Specimen #93 |
| Januzzi et al. (1976) |
| Januzzi et al. (1976) |
| Bill Barret Coll. Specimen |
| Schooner (circa 1980s) +1 other reference |
| Rutley (1902) | |
| Schooner (1947) |
| Heinrich et al. (1953) |
| Bastin (1911) |
| King (2009) |
| King et al. (1994) |
| Cameron +1 other reference |
| P. Cristofono collection |
| King et al. (1994) |
| Cameron +2 other references |
| "Western Massachusetts Mineral ... |
| Plante (1992) |
| Emerson (1917) |
| Emerson (1917) |
| Travis Olds collection +1 other reference |
| USGS Bull 988G +1 other reference |
| Meschter (1953) +4 other references |
| Willden (1964) |
| Castor et al. (2004) | |
| Nevada Bureau of Mines and Geology ... +1 other reference |
| Holmwood (2023) |
| Johnson (1977) |
| NBMG Bull 70 Geology and Mineral ... |
| NBMG Bull 70 Geology and Mineral ... |
| Sharon Cisneros |
| Rocks & Min.: 15: 124. | |
| Smith (2005) |
| Rocks & Min.: 14:252. |
| USGS Prof Paper 353 +3 other references |
| Smith (2005) +1 other reference |
| Meyers et al. (1956) |
| Smith (2005) | |
| |
| The Iron Mines of NJ (1910) |
| Northrop et al. (1996) |
| Kittel (1966) | |
| NMBMMR Memoir 15 Geology and Technology ... | |
| NMBMMR Memoir 15 Geology and Technology ... | |
| NMBMMR Memoir 15 Geology and Technology ... | |
| NMBMMR Memoir 15 Geology and Technology ... | |
| Bingler (1968) +1 other reference |
| U.S. Geological Survey staff (1965) |
| Northrop et al. (1996) |
| Jahns (1946) +1 other reference | |
| Manchester (1931) | |
| Anon (1888a) +1 other reference |
| NY State Museum spec. no. 13932 |
| Manchester (1931) |
| Manchester (1931) | |
| Eric Quinter collection |
| Wood (1996) |
| www.excaliburmineral.com |
| NCGS Information Circular 24 +1 other reference | |
| Genth (1891) | |
| - (n.d.) |
| Smithsonian Institution Mineral ... | |
| Genth (1891) |
| Smithsonian Institution Mineral ... | |
| Roger Howell Collection | |
| - (n.d.) | |
| Mineral Commodity Files | |
| Rocks & Min.:11:77 +2 other references |
| Smithsonian Institution Mineral ... |
| Frondel (1956) +1 other reference |
| Ross (1937) | |
| Rocks & Min.: 11:76. | |
| - (n.d.) |
| Rocks and Minerals (1985) |
| Lemanski collection (8161CL) |
| Grauch et al. (1976) | |
| Gordon (1922) |
| USGS Prof Paper 297F +1 other reference |
| Smith et al. (2000) |
| Smith et al. (2000) |
| Smith et al. (2000) |
| Crook (1977) |
| USGS Bulletin 340 (1908) +1 other reference |
| Self-collected by Franklin Roberts. |
| Self-collected by David Aldridge |
| Bullock (1981) |
| Carter et al. (1965) +1 other reference |
| Valentine et al. (1956) +1 other reference |
| Derkey et al. (1990, November) +1 other reference |
| Cannon (1975) | |
| Hausel et al. (2001) |
| Hausel et al. (2001) |
| Wilmarth et al. (1954) +1 other reference |
Kjørstad, Bamble, Telemark, Norway