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Rakwana, Ratnapura District, Sabaragamuwa Province, Sri Lankai
Regional Level Types
Rakwana- not defined -
Ratnapura DistrictDistrict
Sabaragamuwa ProvinceProvince
Sri LankaCountry

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Latitude & Longitude (WGS84): 6° 27' 53'' North , 80° 36' 57'' East
Latitude & Longitude (decimal): 6.46472,80.61604
GeoHash:G#: tc1kf2yg9
Köppen climate type:Af : Tropical rainforest climate
Nearest Settlements:
PlacePopulationDistance
Ratnapura47,832 (2013)34.1km
Hatton15,073 (2012)47.5km
Haputale4,721 (2015)49.9km


Gem mining district (gem gravels), famous for its "peacock blue" sapphires.

Regions containing this locality

Indian Plate (India Plate)Tectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

19 valid minerals. 3 (TL) - type locality of valid minerals.

Detailed Mineral List:

'Apatite'
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.
'Axinite Group'
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.
Baddeleyite (TL)
Formula: ZrO2
Type Locality:
Reference: Am Min 40 (1955), 275
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.
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
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: [www.johnbetts-fineminerals.com]; 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.; 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.
Danburite
Formula: CaB2Si2O8
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.
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.
Ekanite
Formula: Ca2ThSi8O20
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.
Enstatite
Formula: MgSiO3
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.
Fluorite
Formula: CaF2
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
Geikielite (TL)
Formula: MgTiO3
Description: Gem gravels.
Reference: Nature (1892) 46, 620; Mineralogical Magazine(1893) 10, 145
Ilmenite
Formula: Fe2+TiO3
Kornerupine
Formula: Mg3Al6(Si,Al,B)5O21(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.
Perovskite
Formula: CaTiO3
Reference: Lapis 8(9), 17 (1983)
Quartz
Formula: SiO2
Quartz var: Rose Quartz
Formula: SiO2
Spessartine
Formula: Mn2+3Al2(SiO4)3
Spinel
Formula: MgAl2O4
Reference: Lapis 8(9), 17 (1983); 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.
Srilankite (TL)
Formula: ZrTi2O6
Type Locality:
Reference: Neues Jahrb.Min.,Mh.(1983) 151-157; Lapis 8(9), 17 (1983)
'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.
Zirconolite
Formula: CaZrTi2O7
Reference: Lapis 8(9), 17 (1983)

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Baddeleyite (TL)4.DE.35ZrO2
Chrysoberyl4.BA.05BeAl2O4
Corundum4.CB.05Al2O3
Geikielite (TL)4.CB.05MgTiO3
Ilmenite4.CB.05Fe2+TiO3
Perovskite4.CC.30CaTiO3
Quartz4.DA.05SiO2
var: Rose Quartz4.DA.05SiO2
Spinel4.BB.05MgAl2O4
Srilankite (TL)4.DB.25ZrTi2O6
Zirconolite4.DH.30CaZrTi2O7
Group 9 - Silicates
Beryl9.CJ.05Be3Al2(Si6O18)
var: Aquamarine9.CJ.05Be3Al2Si6O18
Danburite9.FA.65CaB2Si2O8
Diopside9.DA.15CaMgSi2O6
Ekanite9.EA.10Ca2ThSi8O20
Enstatite9.DA.05MgSiO3
Kornerupine9.BJ.50Mg3Al6(Si,Al,B)5O21(OH)
Spessartine9.AD.25Mn2+3Al2(SiO4)3
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Axinite Group'-
'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
Geikielite (TL)4.3.5.2MgTiO3
Ilmenite4.3.5.1Fe2+TiO3
Perovskite4.3.3.1CaTiO3
AX2
Baddeleyite (TL)4.4.14.1ZrO2
Srilankite (TL)4.4.13.2ZrTi2O6
Group 7 - MULTIPLE OXIDES
AB2X4
Chrysoberyl7.2.9.1BeAl2O4
Spinel7.2.1.1MgAl2O4
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
A2B2O6(O,OH,F)
Zirconolite8.2.5.5CaZrTi2O7
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Spessartine51.4.3a.3Mn2+3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with[Si2O7] with borate groups
Danburite56.3.1.1CaB2Si2O8
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [4] and higher coordination; single and double groups (n=1, 2)
Kornerupine58.1.1.1Mg3Al6(Si,Al,B)5O21(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Enstatite65.1.2.1MgSiO3
Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings
Ekanite72.1.1.1Ca2ThSi8O20
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Apatite'-
'Axinite Group'-
Beryl
var: Aquamarine
-Be3Al2Si6O18
'Garnet Group'-X3Z2(SiO4)3
Quartz
var: Rose Quartz
-SiO2
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H KornerupineMg3Al6(Si,Al,B)5O21(OH)
BeBeryllium
Be ChrysoberylBeAl2O4
Be Beryl (var: Aquamarine)Be3Al2Si6O18
Be BerylBe3Al2(Si6O18)
BBoron
B DanburiteCaB2Si2O8
B KornerupineMg3Al6(Si,Al,B)5O21(OH)
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
OOxygen
O BaddeleyiteZrO2
O GeikieliteMgTiO3
O SrilankiteZrTi2O6
O ChrysoberylBeAl2O4
O ZirconoliteCaZrTi2O7
O SpinelMgAl2O4
O PerovskiteCaTiO3
O SpessartineMn32+Al2(SiO4)3
O IlmeniteFe2+TiO3
O Quartz (var: Rose Quartz)SiO2
O Garnet GroupX3Z2(SiO4)3
O DanburiteCaB2Si2O8
O DiopsideCaMgSi2O6
O KornerupineMg3Al6(Si,Al,B)5O21(OH)
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O ZirconZr(SiO4)
O Beryl (var: Aquamarine)Be3Al2Si6O18
O BerylBe3Al2(Si6O18)
O CorundumAl2O3
O EkaniteCa2ThSi8O20
O EnstatiteMgSiO3
O QuartzSiO2
FFluorine
F FluoriteCaF2
MgMagnesium
Mg GeikieliteMgTiO3
Mg SpinelMgAl2O4
Mg DiopsideCaMgSi2O6
Mg KornerupineMg3Al6(Si,Al,B)5O21(OH)
Mg EnstatiteMgSiO3
AlAluminium
Al ChrysoberylBeAl2O4
Al SpinelMgAl2O4
Al SpessartineMn32+Al2(SiO4)3
Al KornerupineMg3Al6(Si,Al,B)5O21(OH)
Al Beryl (var: Aquamarine)Be3Al2Si6O18
Al BerylBe3Al2(Si6O18)
Al CorundumAl2O3
SiSilicon
Si SpessartineMn32+Al2(SiO4)3
Si Quartz (var: Rose Quartz)SiO2
Si Garnet GroupX3Z2(SiO4)3
Si DanburiteCaB2Si2O8
Si DiopsideCaMgSi2O6
Si KornerupineMg3Al6(Si,Al,B)5O21(OH)
Si ZirconZr(SiO4)
Si Beryl (var: Aquamarine)Be3Al2Si6O18
Si BerylBe3Al2(Si6O18)
Si EkaniteCa2ThSi8O20
Si EnstatiteMgSiO3
Si QuartzSiO2
CaCalcium
Ca ZirconoliteCaZrTi2O7
Ca PerovskiteCaTiO3
Ca DanburiteCaB2Si2O8
Ca DiopsideCaMgSi2O6
Ca FluoriteCaF2
Ca EkaniteCa2ThSi8O20
TiTitanium
Ti GeikieliteMgTiO3
Ti SrilankiteZrTi2O6
Ti ZirconoliteCaZrTi2O7
Ti PerovskiteCaTiO3
Ti IlmeniteFe2+TiO3
MnManganese
Mn SpessartineMn32+Al2(SiO4)3
FeIron
Fe IlmeniteFe2+TiO3
ZrZirconium
Zr BaddeleyiteZrO2
Zr SrilankiteZrTi2O6
Zr ZirconoliteCaZrTi2O7
Zr ZirconZr(SiO4)
ThThorium
Th EkaniteCa2ThSi8O20

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

Localities in this Region
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  • Sabaragamuwa Province

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