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Native Gold

A valid IMA mineral species - grandfathered
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About Native GoldHide

Formula:
Au
As a Commodity:
Colour:
Rich yellow, paling to whitish-yellow with increasing silver; blue & green in transmitted light (only thinnest folia [gold leaf])
Lustre:
Metallic
Hardness:
2½ - 3
Specific Gravity:
15 - 19.3
Crystal System:
Isometric
Member of:
Name:
Gold is one of the first minerals used by prehistoric cultures. The Latin name for this mineral was "aurum" and Jöns Jakob Berzelius used Au to represent the element when he established the current system of chemical symbols. The Old English word "gold" first appeared in written form about 725 and may further have been derived from "gehl" or "jehl". May be derived from Anglo-Saxon "gold" = yellow. (Known to alchemists as Sol.)
Copper Group. Gold-Silver Series and Gold-Palladium Series.

The name "Native Gold" is preferred here to avoid confusion although the formal IMA name remains simply "gold".

A native element and precious metal, gold has long been prized for its beauty, resistance to chemical attack and workability. As it is found as a native element, has a relatively low melting point (1063 degrees Celsius) and is malleable, it has been used by mankind for thousands of years.

Gold is used as a standard for international currency and is also widely used in jewelry, electronics (where its superb properties as a conductor help offset its tremendous cost), dentistry and in photographic processes.

Gold occurs in significant amounts in three main types of deposits: hydrothermal quartz veins and related deposits in metamorphic and igneous rocks; in volcanic-exhalative sulphide deposits; and in consolidated to unconsolidated placer deposits. It may also occur in contact metamorphic or hypothermal deposits (e.g. Skarns), or epithermal deposits such as volcanic fumaroles. It is most commonly found as disseminated grains in quartz veins with pyrite and other sulphides, or as rounded grains, flakes, or nuggets in placer deposits in recent to ancient stream and river deposits. Gold is often panned from such deposits by taking advantage of its high density to wash away the lighter sediments from a pan or sluice.

Nuggets are almost exclusively hypogene in origin, forming mostly in veins, but can be somewhat modified in form and chemistry by weathering, erosion, and transport (Hough et al., 2007).


Unique IdentifiersHide

Mindat ID:
1720
Long-form identifier:
mindat:1:1:1720:2

IMA Classification of Native GoldHide

Approved, 'Grandfathered' (first described prior to 1959)

Classification of Native GoldHide

1.AA.05

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
A : Copper-cupalite family
Dana 7th ed.:
1.1.1.1
1.1.1.1

1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1.5

1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
AuIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
AuThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of Native GoldHide

Metallic
Transparency:
Opaque
Colour:
Rich yellow, paling to whitish-yellow with increasing silver; blue & green in transmitted light (only thinnest folia [gold leaf])
Streak:
Shining yellow
Hardness:
2½ - 3 on Mohs scale
Hardness:
VHN10=30 - 34 kg/mm2 - Vickers
Hardness Data:
Measured
Tenacity:
Malleable
Cleavage:
None Observed
None
Fracture:
Hackly
Density:
15 - 19.3 g/cm3 (Measured)    19.309 g/cm3 (Calculated)
Comment:
Calculated density at 0° C. Depends on silver content (pure gold is 19.3).

Optical Data of Native GoldHide

Type:
Isotropic
Reflectivity:
WavelengthR1 (%)R2 (%)
400nm36.8%25.8%
420nm36.8%25.8%
440nm36.5%25.9%
460nm36.1%26.0%
470nm36.0%26.5%
480nm36.7%27.8%
500nm45.3%37.9%
520nm62.5%55.9%
540nm74.0%69.1%
546nm77.0%71.5%
560nm82.2%77.0%
580nm86.8%82.3%
589nm88.2%84.1%
600nm89.7%85.9%
620nm91.9%88.7%
640nm93.3%90.3%
650nm93.8%91.0%
660nm94.1%91.8%
680nm94.8%92.5%
700nm95.3%93.2%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 95.3%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Yellow to white with increasing silver, reddish with copper
Internal Reflections:
none
Pleochroism:
Non-pleochroic
Comments:
Reflectivity from Criddle & Stanley (1993)

Chemistry of Native GoldHide

Mindat Formula:
Au
CAS Registry number:
7440-57-5

CAS Registry numbers are published by the American Chemical Society
Common Impurities:
Ag,Cu,Pd,Hg,Bi

Crystallography of Native GoldHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fm3m
Cell Parameters:
a = 4.0786 Å
Unit Cell V:
67.85 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Usually crude to rounded octahedra, cubes, and dodecahedra to 2 cm. Often elongated along [100] or [111] directions, forming herringbone and dendritic twins. Flattened {111} plates with triangular octahedral faces. Rarely as wires ([111] elongation); reticulated; dendritic; arborescent; filiform; spongy; also massive in rounded fragments, flattened grains and scales (gold dust).
Twinning:
Common on (111) to give herringbone twins. Repeated on (111) to give stacks of spinel twins that form hexagonal wires.

Crystallographic forms of Native GoldHide

Crystal Atlas:
Image Loading
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Gold no.1 - Goldschmidt (1913-1926)
Gold no.3 - Goldschmidt (1913-1926)
Gold no.4 - Goldschmidt (1913-1926)
Gold no.17 - Goldschmidt (1913-1926)
Gold no.46 - Goldschmidt (1913-1926)
Gold no.47 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0011140Native GoldWyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Cubic closest packed, ccp, structure Crystal Structures 1 7-8319630293
0012935Native GoldJette E R, Foote F (1935) Precision determination of lattice constants Journal of Chemical Physics 3 605-6161935synthetic0298
0013108Native GoldSuh I-K, Ohta H, Waseda Y (1988) High-temperature thermal expansion of six metallic elements measured by dilatation method and X-ray diffraction Journal of Materials Science 23 757-7601988synthetic0293
0013109Native GoldSuh I-K, Ohta H, Waseda Y (1988) High-temperature thermal expansion of six metallic elements measured by dilatation method and X-ray diffraction Journal of Materials Science 23 757-7601988synthetic0574
0013110Native GoldSuh I-K, Ohta H, Waseda Y (1988) High-temperature thermal expansion of six metallic elements measured by dilatation method and X-ray diffraction Journal of Materials Science 23 757-7601988synthetic0676
0013111Native GoldSuh I-K, Ohta H, Waseda Y (1988) High-temperature thermal expansion of six metallic elements measured by dilatation method and X-ray diffraction Journal of Materials Science 23 757-7601988synthetic0777
0013112Native GoldSuh I-K, Ohta H, Waseda Y (1988) High-temperature thermal expansion of six metallic elements measured by dilatation method and X-ray diffraction Journal of Materials Science 23 757-7601988synthetic0875
0013113Native GoldSuh I-K, Ohta H, Waseda Y (1988) High-temperature thermal expansion of six metallic elements measured by dilatation method and X-ray diffraction Journal of Materials Science 23 757-7601988synthetic0971
0013114Native GoldSuh I-K, Ohta H, Waseda Y (1988) High-temperature thermal expansion of six metallic elements measured by dilatation method and X-ray diffraction Journal of Materials Science 23 757-7601988synthetic01075
0013115Native GoldSuh I-K, Ohta H, Waseda Y (1988) High-temperature thermal expansion of six metallic elements measured by dilatation method and X-ray diffraction Journal of Materials Science 23 757-7601988synthetic01179
0013116Native GoldSuh I-K, Ohta H, Waseda Y (1988) High-temperature thermal expansion of six metallic elements measured by dilatation method and X-ray diffraction Journal of Materials Science 23 757-7601988synthetic01280
0013117Native GoldSuh I-K, Ohta H, Waseda Y (1988) High-temperature thermal expansion of six metallic elements measured by dilatation method and X-ray diffraction Journal of Materials Science 23 757-7601988synthetic01324
0014943Native GoldOwen E A, Yates E L (1933) Precision measurements of crystal parameters Philosophical Magazine 15 472-4881933synthetic0291
0015132Native GoldDavey W P (1925) Lattice constants of twelve common metals Physical Review 25 753-7611925synthetic0293
0015133Native GoldDavey W P (1925) Lattice constants of twelve common metals Physical Review 25 753-7611925synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.355 Å(100)
2.039 Å(52)
1.230 Å(36)
1.442 Å(32)
0.9357 Å(23)
0.8325 Å(23)
0.9120 Å(22)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 3a: Earth’s earliest Hadean crust>4.50
7 : Ultramafic igneous rocks
8 : Mafic igneous rocks
Stage 3b: Earth’s earliest hydrosphere>4.45
12 : Hadean hydrothermal subsurface sulfide deposits (see also #33)
Near-surface Processes
26 : Hadean detrital minerals
High-𝑇 alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])
Stage 4b: Highly evolved igneous rocks>3.0
36 : Carbonatites, kimberlites, and related igneous rocks
37 : Layered igneous intrusions and related PGE minerals
Stage 5: Initiation of plate tectonics<3.5-2.5
38 : Ophiolites
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere<0.6
49 : Oxic cellular biomineralization (see also #44)<0.54
Geological Setting:
1) Primary hydrothermal veins
2) Volcanic-exhalative sulphide deposits
3) Alluvial and eluvial

Synonyms of Native GoldHide

Other Language Names for Native GoldHide

Afrikaans:Goud
Albanian:Ari
Asturian:Oru
Aymara:Quri
Basque:Urre
Bishnupriya Manipuri:àŠ”àŠ°à§‹
Bosnian:Zlato
Catalan:Or
Corsican:Oru
Croatian:Zlato
Czech:Zlato
Danish:Guld
Dutch:Goud
Esperanto:Oro
Estonian:Kuld
Farsi/Persian:Ű·Ù„Ű§
Finnish:Kulta
French:Or
Or natif
Friulian:Aur
Galician:Ouro
Gan:金
Guarani:Kuarepotiju
Haitian:LĂČ
Hakka:KĂźm
Hungarian:Arany
Icelandic:Gull
Ido:Oro
Indonesian:Emas
Irish Gaelic:Ór
Javanese:Emas
Kapampangan:Gintu
Kazakh (Cyrillic Script):ĐĐ»Ń‚Ń‹Đœ
Kongo:Wolo
Korean:ꞈ
Kurdish (Latin Script):ZĂȘr
Latin:Aurum
Latvian:Zelts
Limburgian:Goud
Lingala:WĂłlo
Lithuanian:Auksas
Lojban:Solji
Low Saxon/Low German:Native Gold
Luxembourgish:Native Gold
Malay:Emas
Manx:Airh
Min Nan:Au
Mongolian:Алт
Norman:Or
Norwegian:Gull
Norwegian (Nynorsk):Gull
Occitan:Aur
Polish:ZƂoto
Portuguese:Ouro
Quechua:Quri
Ripuarian:Jold
Romanian:Aur
Scottish Gaelic:Òr
Serbo-Croatian:Zlato
Sicilian:Oru
Simplified Chinese:è‡Ș然金
Slovak:Zlato
Slovenian:Zlato
Swahili:Dhahabu
Tagalog:Ginto
Tajik (Cyrillic Script):Зар
Turkish:Altın
Uzbek (Latin Script):Oltin
Venetian:Oro
Vietnamese:VĂ ng
Welsh:Aur
Zazaki:Zern
Zhuang:Gim
Zulu:Igolide

Varieties of Native GoldHide

ArgentocuproauriteTwo grains found of essentially cuprian electrum
Argentocuproaurite-IA grain from Noril'sk.

Originally reported from Talnakh Cu-Ni Deposit, Noril'sk, Putoran Plateau, Taimyr Peninsula, Taimyr Autonomous Region (Taymyrskiy Okrug), Krasnoyarsk Territory (Krasnoyarsk Kray; Krasnoyarskii Krai), Eastern-Siberian Region, Russia...
Argentocuproaurite-IIA grain of cuprian electrum from Talnakh deposit, Russia.
Bismuth-bearing GoldA variety of gold containing several weight percent of bismuth, possibly in solid solution (Palache, Berman & Frondel, 1944).

A variety containing 13.5 weight percent of bismuth (on average) has been reported by Shu et al. (2006).
Copper-bearing GoldA variety of Gold possibly containing Cu in substitution for Au to at least 20%.
ElectrumGold-Silver Series .
High silver-bearing gold is pale yellow, nearly white (Ramdohr, 1969).
Iridian GoldAn iridium-rich variety of gold.
Lead-bearing GoldA Pb-bearing variety from Polish Cu-bearing Zechstein polymetallic deposits. Mineral from Ariadnenskoe deposit contains 19.73 mass% Pb.
Mercurian GoldA variety of gold with a Mercury content of up to 15 weight percent.
Nickel-bearing GoldNatural gold-nickel alloys with Ni contents up to 40 mass%. The colour of such alloys can be silver-white.
Palladium-bearing GoldA palladium-bearing variety of gold.
Platinum-bearing GoldA platinum-rich variety of gold.
PorpeziteGold-Palladium Series .

A tan-coloured palladium-bearing variety of gold containing 5-10 wt% Pd.
PyrrhochrysitSilver rich gold
RhoditeA rhodian variety of Gold. Gold containing 34 to 43 weight percent Rh has been reported from Columbia & Mexico, but not confirmed.
Silver- and mercury-bearing GoldA variety of gold, containing up to 31 weight percent of silver and up to 15 weight percent of mercury.
Compare also Unnamed (Ag-Au Amalgam).

Relationship of Native Gold to other SpeciesHide

Member of:
Other Members of Copper Group:
MaldoniteAu2BiIso. m3m (4/m 3 2/m) : Fd3m
Native CopperCuIso. m3m (4/m 3 2/m) : Fm3m
Native SilverAgIso. m3m (4/m 3 2/m) : Fm3m
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
3,034 photos of Native Gold associated with QuartzSiO2
293 photos of Native Gold associated with PyriteFeS2
221 photos of Native Gold associated with FamatiniteCu3SbS4
202 photos of Native Gold associated with BismuthiniteBi2S3
181 photos of Native Gold associated with GalenaPbS
178 photos of Native Gold associated with CalciteCaCO3
176 photos of Native Gold associated with ChalcopyriteCuFeS2
168 photos of Native Gold associated with ArsenopyriteFeAsS
168 photos of Native Gold associated with SphaleriteZnS
133 photos of Native Gold associated with HessiteAg2Te

Related Minerals - Strunz-mindat GroupingHide

1.AA.JonlarseniteAl4Cu9Iso. 4 3m : P4 3m
1.AA.05Native LeadPbIso. m3m (4/m 3 2/m) : Fm3m
1.AA.05aAuricupride Subgroup
1.AA.05Native NickelNiIso. m3m (4/m 3 2/m) : Fm3m
1.AA.05Native SilverAgIso. m3m (4/m 3 2/m) : Fm3m
1.AA.05UM2004-08-E:AuCuPdCu2PdAu
1.AA.05UM1991-06-E:AuCuAu3Cu
1.AA.05Native AluminiumAlIso. m3m (4/m 3 2/m) : Fm3m
1.AA.05SteinhardtiteAl0.38Ni0.32Fe0.30Iso. m3m (4/m 3 2/m) : Im3m
1.AA.05Native CopperCuIso. m3m (4/m 3 2/m) : Fm3m
1.AA.05Copper Group
1.AA.10aCuproaurideCu3Au
1.AA.10bTetra-auricuprideAuCuTet. 4/mmm (4/m 2/m 2/m) : P4/mmm
1.AA.10aAuricuprideCu3AuIso. m3m (4/m 3 2/m) : Pm3m
1.AA.10Nickel Group
1.AA.15AnyuiiteAuPb2Tet. 4/mmm (4/m 2/m 2/m) : I4/mcm
1.AA.15NovodnepriteAuPb3Tet. 4 2m : I4 2m
1.AA.15UM1985-02-E:AlZn(Zn,Cu)Al2
1.AA.15Khatyrkite(Cu,Zn)Al2Tet. 4/mmm (4/m 2/m 2/m) : I4/mcm
1.AA.20Cupalite(Cu,Zn)AlOrth.
1.AA.25HunchuniteAu2PbIso. m3m (4/m 3 2/m)
1.AA.30StolperiteAlCuIso. m3m (4/m 3 2/m) : Pm3m
1.AA.35HollisteriteAl3FeMon. 2/m : B2/m
1.AA.40IcosahedriteAl63Cu24Fe13Icos. 5 3m : Fm 3 5
1.AA.45Kryachkoite(Al,Cu)6(Fe,Cu)Orth. mm2 : Cmc21
1.AA.50ProxidecagoniteAl34Ni9Fe2Orth. mmm (2/m 2/m 2/m) : Pnma

Fluorescence of Native GoldHide

Other InformationHide

Thermal Behaviour:
Melting Point: 1062.4° ± 0.8°
Notes:
Completely soluble with copper. Insoluble in acids except for aqua regia, with incomplete separation if more than 20% of silver is present.

Reported as spongy alteration pseudomorphs after calaverite (Cripple Creek).
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Industrial Uses:
Electrical conductor, transparent reflective coating, jewelry, dentistry, coinage, decorative coatings

Native Gold in petrologyHide

An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.

Internet Links for Native GoldHide

References for Native GoldHide

Reference List:

Significant localities for Native GoldHide

Showing 39 significant localities out of 37,299 recorded on mindat.org.

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 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). 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.
Argentina
 
  • TucumĂĄn Province
    • BurruyacĂș Department
      • La Ramada y La Cruz
        • Sierra de La Ramada
RaĂșl Jorge Tauber LarryÂŽs collection.Peña (1970)
Australia
 
  • Tasmania
    • Kentish municipality
      • Moina - Middlesex District
Bottrill et al. (2008)
Bottrill et al. (2008) +1 other reference
Austria
 
  • Salzburg
    • St. Johann im Pongau District
      • MĂŒhlbach am Hochkönig
Paar et al. (1978) +1 other reference
Canada
 
  • British Columbia
    • New Westminster Mining Division
      • Harrison Lake
        • Bear Mountain
British Columbia Ministry of Energy +1 other reference
  • Newfoundland and Labrador
    • Newfoundland
      • Baie Verte Peninsula
        • Betts Cove
Swinden et al. (1990)
  • Ontario
    • Cochrane District
      • Timmins
Ontario MDI Number: MDI42A06NW00032 +4 other references
        • Whitney Township
Sabina (1974) +1 other reference
Ireland
 
  • Connacht
    • Galway County
      • Bohaun
Ovoca Gold Exploration reports. +1 other reference
    • Mayo County
      • Croagh Patrick
Wolfe et al. (2008)
Papua New Guinea
 
  • Enga Province
    • Mount Hagen
      • Mount Kare Valley
Sorrell (n.d.) +2 other references
Romania
 
  • Alba County
    • Zlatna
Carles Curto Mila collection
  • Hunedoara County
    • Băița
      • Trestia
Russia
 
  • Chelyabinsk Oblast
    • Miass
Ozerskii et al. (1843) +3 other references
  • Sverdlovsk Oblast
    • Beryozovsky
Lehmann et al. (1999) +3 other references
Taiwan
 
  • New Taipei City
    • Ruifang District
      • Chinkuashih mine
James K.C.Huang Collection +3 other references
UK
 
  • England
    • Devon
      • Torbay
        • Torquay
Russell (1929) +4 other references
USA
 
  • Alabama
    • Randolph County
      • Pinetucky Mining District
Cook et al. (1982)
  • California
    • Mariposa County
      • Bagby-Mariposa-Mount Bullion-Whitlock Mining District
        • Whitlock Mining District
          • Colorado area
Rocks & Minerals 83:5 pp 392-401 +2 other references
          • Colorado Mining District
            • Colorado
Eidahl (1977) +4 other references
    • Placer County
Rocks & Minerals
        • Sage Hill
Waring (1917)
MinRec.:20 (5)
  • Colorado
    • Clear Creek County
      • Lamartine Mining District
Speckels (1965) +1 other reference
    • Eagle County
      • Gilman Mining District (Battle Mountain Mining District; Red Cliff Mining District)
        • Battle Mountain
Rocks & Min.:57:61.
    • Lake County
Eckel et al. (1997)
    • Moffat County
      • Fourmile Mining District (Timberlake Creek Mining District)
Maneotis: 2009
    • San Juan County
      • Eureka Mining District
        • Gladstone
          • Bonita Peak
the Book "Colorado Gold" by Allen Bird (ex manager of the mine) +3 other references
  • Georgia
    • Hall County
      • Gainesville
Rocks & Min.: 64:196.
  • Nevada
    • Humboldt County
      • Awakening Mining District
[var: Electrum] USGS Bull 2090 +3 other references
    • Nye County
      • Toquima Range
        • Round Mountain Mining District
          • Round Mountain
- (2005) +1 other reference
    • Washoe County
      • Pah Rah Range (Pah Rah Mts)
Lieberman (1989)
          • Alta Gold Mine
[var: Electrum] www.mindat.org (n.d.)
R&M 79:1 p44-54
  • North Carolina
    • Davidson County
      • Carolina Slate Belt
        • Cid Mining District
- (2005)
  • Washington
    • King County
      • Snoqualmie Mining District
        • Hansen Creek
Eric He's Collection
    • Kittitas County
      • Swauk Mining District
        • Liberty
Rice Museum
Venezuela
 
  • BolĂ­var
    • Gran Sabana Municipality
      • IcabarĂș
        • IcabarĂș River placers (Kilometer 88 District)
Steve Smale specimens +1 other reference
 
and/or  
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