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Elahera District, Central Province, Sri Lankai
Regional Level Types
Elahera DistrictDistrict
Central ProvinceProvince
Sri LankaCountry

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View of the Elahera gem mining area, in 1979.

Elahera District, Central Province, Sri Lanka
View of the Elahera gem mining area, in 1979.

Elahera District, Central Province, Sri Lanka
View of the Elahera gem mining area, in 1979.

Elahera District, Central Province, Sri Lanka
View of the Elahera gem mining area, in 1979.

Elahera District, Central Province, Sri Lanka
View of the Elahera gem mining area, in 1979.

Elahera District, Central Province, Sri Lanka
View of the Elahera gem mining area, in 1979.

Elahera District, Central Province, Sri Lanka
View of the Elahera gem mining area, in 1979.

Elahera District, Central Province, Sri Lanka
View of the Elahera gem mining area, in 1979.

Elahera District, Central Province, Sri Lanka


Gem mining in highly metamorphosed sedimentary rocks 115 km NE of Colombo. Produces 35% of the island's gemstones.
Gems & Gemology 1986, 22 (2), 80-95

Regions containing this locality

AsiaContinent
Indian Plate (India Plate)Tectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals.

Detailed Mineral List:

Chrysoberyl
Formula: BeAl2O4
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.; 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
Reference: LANKA, G. (1984). State Gem Corporation, Mount Lavinia, Sri Lanka. Non-Metallic Mineral Ores, 15, 343.
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.
'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.
Kornerupine
Formula: Mg3Al6(Si,Al,B)5O21(OH)
Reference: Cooper, Mark and Hawthorne, Frank C., 2009, The Crystal Chemistry of the Kornerupine-Prismatine Series. 1. Crystal Structure and Site Populations, Canadian Mineralogist, v. 47, p. 233-262.; 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.
Pyrope
Formula: Mg3Al2(SiO4)3
Reference: Gem mining in highly metamorphosed sedimentary rocks 115 km NE of Colombo. Produces 35% of the island's gemstones. Gems & Gemology 1986, 22 (2), 80-95
Pyrope var: Rhodolite
Formula: Mg3Al2(SiO4)3
Reference: Shigley, J. E., Laurs, B. M., Janse, A. J. A., Elen, S., & Dirlam, D. M. (2010). Gem Localities of the 2000s. Gems & Gemology, 46(3).
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: 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.
Titanite
Formula: CaTi(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.
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
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.
Zircon
Formula: Zr(SiO4)
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.; 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
Spinel4.BB.05MgAl2O4
Group 6 - Borates
Sinhalite6.AC.05MgAl(BO4)
Group 9 - Silicates
Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
var: Iolite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
Kornerupine9.BJ.50Mg3Al6(Si,Al,B)5O21(OH)
Pyrope9.AD.25Mg3Al2(SiO4)3
var: Rhodolite9.AD.25Mg3Al2(SiO4)3
Titanite9.AG.15CaTi(SiO4)O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Garnet Group'-X3Z2(SiO4)3
'Tourmaline'-A(D3)G6(Si6O18)(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] and >[6] coordination
Pyrope51.4.3a.1Mg3Al2(SiO4)3
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 [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
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 Al substituted rings
Cordierite61.2.1.1(Mg,Fe)2Al3(AlSi5O18)
Unclassified Minerals, Mixtures, etc.
var: Iolite-(Mg,Fe)2Al3(AlSi5O18)
Corundum
var: Ruby
-Al2O3
var: Sapphire-Al2O3
'Garnet Group'-X3Z2(SiO4)3
Pyrope
var: Rhodolite
-Mg3Al2(SiO4)3
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H KornerupineMg3Al6(Si,Al,B)5O21(OH)
BeBeryllium
Be ChrysoberylBeAl2O4
BBoron
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
B SinhaliteMgAl(BO4)
B KornerupineMg3Al6(Si,Al,B)5O21(OH)
OOxygen
O Corundum (var: Ruby)Al2O3
O Corundum (var: Sapphire)Al2O3
O ChrysoberylBeAl2O4
O Pyrope (var: Rhodolite)Mg3Al2(SiO4)3
O SpinelMgAl2O4
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
O ZirconZr(SiO4)
O SinhaliteMgAl(BO4)
O PyropeMg3Al2(SiO4)3
O KornerupineMg3Al6(Si,Al,B)5O21(OH)
O Cordierite (var: Iolite)(Mg,Fe)2Al3(AlSi5O18)
O TitaniteCaTi(SiO4)O
O CorundumAl2O3
O Garnet GroupX3Z2(SiO4)3
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
MgMagnesium
Mg Pyrope (var: Rhodolite)Mg3Al2(SiO4)3
Mg SpinelMgAl2O4
Mg SinhaliteMgAl(BO4)
Mg PyropeMg3Al2(SiO4)3
Mg KornerupineMg3Al6(Si,Al,B)5O21(OH)
Mg Cordierite (var: Iolite)(Mg,Fe)2Al3(AlSi5O18)
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
AlAluminium
Al Corundum (var: Ruby)Al2O3
Al Corundum (var: Sapphire)Al2O3
Al ChrysoberylBeAl2O4
Al Pyrope (var: Rhodolite)Mg3Al2(SiO4)3
Al SpinelMgAl2O4
Al SinhaliteMgAl(BO4)
Al PyropeMg3Al2(SiO4)3
Al KornerupineMg3Al6(Si,Al,B)5O21(OH)
Al Cordierite (var: Iolite)(Mg,Fe)2Al3(AlSi5O18)
Al CorundumAl2O3
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
SiSilicon
Si Pyrope (var: Rhodolite)Mg3Al2(SiO4)3
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
Si ZirconZr(SiO4)
Si PyropeMg3Al2(SiO4)3
Si KornerupineMg3Al6(Si,Al,B)5O21(OH)
Si Cordierite (var: Iolite)(Mg,Fe)2Al3(AlSi5O18)
Si TitaniteCaTi(SiO4)O
Si Garnet GroupX3Z2(SiO4)3
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
CaCalcium
Ca TitaniteCaTi(SiO4)O
TiTitanium
Ti TitaniteCaTi(SiO4)O
FeIron
Fe Cordierite (var: Iolite)(Mg,Fe)2Al3(AlSi5O18)
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)
ZrZirconium
Zr ZirconZr(SiO4)

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