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Wonder Well, Riverina Station, Menzies Shire, Western Australia, Australiai
Regional Level Types
Wonder WellWell
Riverina Station- not defined -
Menzies ShireShire
Western AustraliaState
AustraliaCountry

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Key
Latitude & Longitude (WGS84):
29° 41' 49'' South , 120° 34' 32'' East
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:


Emeralds are found associated with a series of pegmatite dykes concordantly emplaced along schistosity planes within ultramafic rocks. The host schists formed through K metasomatism during intrusion of the pegmatite. Beryls occur in the pegmatite, but are more abundant in the microschist.
Locality description: 44 km west of the township of Menzies in the Mining District of Ularring.
Latitude: -29.69739
Longitude: 120.576
Coordinates: 265474mE, 6712287mN.
References: Minedex Database, Geological Survey of Western Australia, 2006.

Local folklore states the deposit was discovered by workers grading the dirt road north of Riverina Station in 1974. Irregular mining has taken place since then, but specimens are rarely seen. The reason could be the small size of the crystals found. Low quality emeralds are relatively common in Western Australia, where beryl bearing pegmatites have intruded chromium and vanadium bearing ultramafic greenstone.

From 1974 to 1980, Norm and Wilma MacKay, Frank Trask, and Peter Goodeve as partners, reputedly recovering 48 165 carats of emeralds. David Vaughan and Luigi Madonini, mined the deposit for one year in the late 1970's under tribute, but could not make the enterprise financially viable. Roger Lindsay took over the lease in 1983, and was joined by mining partner Donald North in 1994. By 2001 they had recovered 14 409 grams of facet grade emerald. In 2011 the mine was still active, and signage/road bunds would indicate the casual fossicker is not welcome, although organised groups have been allowed into the mine.

The deposit is a series of narrow pegmatites showing albite-oligoclase with minor biotite and plagioclase, and albite-oligoclase- quartz with minor biotite, with phlogopite schists along the contact. The schist near the pegmatites is tremolite/actinolite-phlogopite-biotite.

Emeralds found along the contact zone are medium green, while those within the pegmatite are blue-green, yellow-green or green. Some gem quality phenakite crystals have also been found at the mine.

The emphasis seems to be to produce material for cut stone, when the deposit would also lend itself to specimen collections. More material needs to be seen on the specimen collecting market for this site.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Albite
Formula: Na(AlSi3O8)
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Reference: Jacobson, M., Calderwood, M., Grguric, B.(2007): Pegmatites of Western Australia (2007)
'Albite-Anorthite Series'
Reference: Jacobson, M., Calderwood, M., Grguric, B.(2007): Pegmatites of Western Australia (2007)
Beryl
Formula: Be3Al2(Si6O18)
Reference: ; Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Beryl var: Emerald
Formula: Be3Al2(Si6O18)
Reference: ; Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Reference: ; Pegmatites of Western Australia; M Jacobson, M Calderwood, B Grguric; Hesperian Press, Perth, 2007
'Chlorite Group'
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Chromite
Formula: Fe2+Cr3+2O4
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Dolomite
Formula: CaMg(CO3)2
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Phenakite
Formula: Be2SiO4
Reference: Fetherston, J.M., Stocklmayer, S.M., Stocklmayer, V. (2013) Gemstones of Western Australia. Geological Survey of Western Australia, Bulletin 25, 325pp.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Quartz
Formula: SiO2
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: Jacobson, M., Calderwood, M., Grguric, B.(2007): Pegmatites of Western Australia (2007)

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Dolomite5.AB.10CaMg(CO3)2
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite9.FA.35Na(AlSi3O8)
var: Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Beryl9.CJ.05Be3Al2(Si6O18)
var: Emerald9.CJ.05Be3Al2(Si6O18)
Phenakite9.AA.05Be2SiO4
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-

List of minerals arranged by Dana 8th Edition classification

Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [4] coordination
Phenakite51.1.1.1Be2SiO4
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite
var: Oligoclase
-(Na,Ca)[Al(Si,Al)Si2O8]
'Albite-Anorthite Series'-
Beryl
var: Emerald
-Be3Al2(Si6O18)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-

List of minerals for each chemical element

HHydrogen
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H PhlogopiteKMg3(AlSi3O10)(OH)2
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
BeBeryllium
Be Beryl (var: Emerald)Be3Al2(Si6O18)
Be PhenakiteBe2SiO4
Be BerylBe3Al2(Si6O18)
CCarbon
C DolomiteCaMg(CO3)2
OOxygen
O Beryl (var: Emerald)Be3Al2(Si6O18)
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O QuartzSiO2
O PhlogopiteKMg3(AlSi3O10)(OH)2
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O ChromiteFe2+Cr23+O4
O DolomiteCaMg(CO3)2
O AlbiteNa(AlSi3O8)
O PhenakiteBe2SiO4
O BerylBe3Al2(Si6O18)
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
NaSodium
Na AlbiteNa(AlSi3O8)
Na Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg DolomiteCaMg(CO3)2
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
AlAluminium
Al Beryl (var: Emerald)Be3Al2(Si6O18)
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al AlbiteNa(AlSi3O8)
Al BerylBe3Al2(Si6O18)
Al Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
SiSilicon
Si Beryl (var: Emerald)Be3Al2(Si6O18)
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si QuartzSiO2
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si AlbiteNa(AlSi3O8)
Si PhenakiteBe2SiO4
Si BerylBe3Al2(Si6O18)
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
KPotassium
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca DolomiteCaMg(CO3)2
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
CrChromium
Cr ChromiteFe2+Cr23+O4
FeIron
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe ChromiteFe2+Cr23+O4

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Jacobson, M., Calderwood, M., Grguric, B.(2007): Pegmatites of Western Australia (2007)

Other Regions, Features and Areas containing this locality

Australia
Australian PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
 
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