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Avissawella, Western Province, Sri Lanka

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Latitude & Longitude (WGS84): 6° 57' 31'' North , 80° 11' 55'' East
Latitude & Longitude (decimal): 6.95856,80.19866
GeoHash:G#: tc1p8fybs
Köppen climate type:Af : Tropical rainforest climate


Gem mining (corundum varieties).

Located on the border to Sabaragamuwa Province.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


11 valid minerals.

Detailed Mineral List:

Andalusite
Formula: Al2(SiO4)O
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
Beryl
Formula: Be3Al2(Si6O18)
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
Chrysoberyl
Formula: BeAl2O4
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
Cordierite var: Iolite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
Corundum
Formula: Al2O3
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
Corundum var: Ruby
Formula: Al2O3
Corundum var: Sapphire
Formula: Al2O3
Reference: Shigley, J. E., Dirlam, D. M., Laurs, B. M., Boehm, E. W., Bosshart, G., & Larson, W. F. (2000). Gem localities of the 1990s. Gems & Gemology, 36(4), 292-335.
Diopside
Formula: CaMgSi2O6
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
Quartz
Formula: SiO2
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
Quartz var: Amethyst
Formula: SiO2
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
Sinhalite
Formula: MgAl(BO4)
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
Spinel
Formula: MgAl2O4
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.
Zircon
Formula: Zr(SiO4)
Reference: Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Chrysoberyl4.BA.05BeAl2O4
Corundum4.CB.05Al2O3
var: Ruby4.CB.05Al2O3
var: Sapphire4.CB.05Al2O3
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
Spinel4.BB.05MgAl2O4
Group 6 - Borates
Sinhalite6.AC.05MgAl(BO4)
Group 9 - Silicates
Andalusite9.AF.10Al2(SiO4)O
Beryl9.CJ.05Be3Al2(Si6O18)
Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
var: Iolite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
Diopside9.DA.15CaMgSi2O6
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
Garnet Group-X3Z2(SiO4)3
Tourmaline-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Corundum4.3.1.1Al2O3
Group 7 - MULTIPLE OXIDES
AB2X4
Chrysoberyl7.2.9.1BeAl2O4
Spinel7.2.1.1MgAl2O4
Group 24 - ANHYDROUS BORATES
A2XO4
Sinhalite24.1.1.1MgAl(BO4)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Andalusite52.2.2b.1Al2(SiO4)O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Six-Membered Rings with Al substituted rings
Cordierite61.2.1.1(Mg,Fe)2Al3(AlSi5O18)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
Cordierite
var: Iolite
-(Mg,Fe)2Al3(AlSi5O18)
Corundum
var: Ruby
-Al2O3
var: Sapphire-Al2O3
'Garnet Group'-X3Z2(SiO4)3
Quartz
var: Amethyst
-SiO2
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
BeBeryllium
Be BerylBe3Al2(Si6O18)
Be ChrysoberylBeAl2O4
BBoron
B SinhaliteMgAl(BO4)
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
OOxygen
O Quartz (var: Amethyst)SiO2
O AndalusiteAl2(SiO4)O
O BerylBe3Al2(Si6O18)
O ChrysoberylBeAl2O4
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
O CorundumAl2O3
O DiopsideCaMgSi2O6
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Garnet GroupX3Z2(SiO4)3
O Cordierite (var: Iolite)(Mg,Fe)2Al3(AlSi5O18)
O QuartzSiO2
O Corundum (var: Ruby)Al2O3
O Corundum (var: Sapphire)Al2O3
O SinhaliteMgAl(BO4)
O SpinelMgAl2O4
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O ZirconZr(SiO4)
MgMagnesium
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mg DiopsideCaMgSi2O6
Mg Cordierite (var: Iolite)(Mg,Fe)2Al3(AlSi5O18)
Mg SinhaliteMgAl(BO4)
Mg SpinelMgAl2O4
AlAluminium
Al AndalusiteAl2(SiO4)O
Al BerylBe3Al2(Si6O18)
Al ChrysoberylBeAl2O4
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
Al CorundumAl2O3
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Cordierite (var: Iolite)(Mg,Fe)2Al3(AlSi5O18)
Al Corundum (var: Ruby)Al2O3
Al Corundum (var: Sapphire)Al2O3
Al SinhaliteMgAl(BO4)
Al SpinelMgAl2O4
SiSilicon
Si Quartz (var: Amethyst)SiO2
Si AndalusiteAl2(SiO4)O
Si BerylBe3Al2(Si6O18)
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
Si DiopsideCaMgSi2O6
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Garnet GroupX3Z2(SiO4)3
Si Cordierite (var: Iolite)(Mg,Fe)2Al3(AlSi5O18)
Si QuartzSiO2
Si ZirconZr(SiO4)
CaCalcium
Ca DiopsideCaMgSi2O6
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
FeIron
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe Cordierite (var: Iolite)(Mg,Fe)2Al3(AlSi5O18)
ZrZirconium
Zr ZirconZr(SiO4)

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Precambrian
541 - 4000 Ma



ID: 3189863
Precambrian crystalline metamorphic rocks

Age: Precambrian (541 - 4000 Ma)

Lithology: Crystalline metamorphic rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


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