Vote for your favorite mineral in #MinCup26! - Azurite vs. Smithsonite
It's carbonate-vs-carbonate to kick off Mineral Cup 2026 with copper-rich Azurite against zinc-rich Smithsonite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Okkampitiya, Monaragala District, Uva Province, Sri Lankai
Regional Level Types
OkkampitiyaVillage
Monaragala DistrictDistrict
Uva ProvinceProvince
Sri LankaCountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
04551460017272058834787.jpg
Sapphire

Okkampitiya, Monaragala District, Uva Province, Sri Lanka
02642150017272046796706.jpg
Chrysoberyl

Okkampitiya, Monaragala District, Uva Province, Sri Lanka
06649180017272058839354.jpg
Sapphire

Okkampitiya, Monaragala District, Uva Province, Sri Lanka
04551460017272058834787.jpg
Sapphire

Okkampitiya, Monaragala District, Uva Province, Sri Lanka
02642150017272046796706.jpg
Chrysoberyl

Okkampitiya, Monaragala District, Uva Province, Sri Lanka
06649180017272058839354.jpg
Sapphire

Okkampitiya, Monaragala District, Uva Province, Sri Lanka
09601070017272058832363.jpg
Sapphire

Okkampitiya, Monaragala District, Uva Province, Sri Lanka
09542650017272046792868.jpg
Chrysoberyl

Okkampitiya, Monaragala District, Uva Province, Sri Lanka
Latitude & Longitude (WGS84):
6° 45' 7'' North , 81° 18' 22'' East
Latitude & Longitude (decimal):
6.75216,81.30630
GeoHash:
G#: tc1y6jjqn
GRN:
N05E57
Type:
Village
Köppen climate type:
Af : Tropical rainforest climate
Mindat Locality ID:
28693
Long-form identifier:
mindat:1:2:28693:1
GUID (UUID V4):
0


Gem deposit, gravel in karstic potholes and primary calc-silicate rocks. Among the gems are blue sapphire and sillimanite.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


7 valid minerals.

Detailed Mineral List:

ⓘ 'Allanite Group'
Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
ⓘ Chrysoberyl
Formula: BeAl2O4
ⓘ Corundum
Formula: Al2O3
ⓘ Corundum var. Sapphire
Formula: Al2O3
ⓘ Ekanite
Formula: Ca2ThSi8O20
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ Grossular
Formula: Ca3Al2(SiO4)3
ⓘ Grossular var. Hessonite
Formula: Ca3Al2(SiO4)3
ⓘ Sillimanite
Formula: Al2(SiO4)O
ⓘ Spinel
Formula: MgAl2O4
ⓘ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z
ⓘ Zircon
Formula: Zr(SiO4)

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘChrysoberyl4.BA.05BeAl2O4
ⓘSpinel4.BB.05MgAl2O4
ⓘCorundum4.CB.05Al2O3
ⓘvar. Sapphire4.CB.05Al2O3
Group 9 - Silicates
ⓘGrossular9.AD.25Ca3Al2(SiO4)3
ⓘvar. Hessonite9.AD.25Ca3Al2(SiO4)3
ⓘZircon9.AD.30Zr(SiO4)
ⓘSillimanite9.AF.05Al2(SiO4)O
ⓘEkanite9.EA.10Ca2ThSi8O20
Unclassified
ⓘ'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
ⓘ'Garnet Group'-X3Z2(SiO4)3
ⓘ'Allanite Group'-(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)

List of minerals for each chemical element

HHydrogen
Hⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
BeBeryllium
Beⓘ ChrysoberylBeAl2O4
BBoron
Bⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
OOxygen
Oⓘ ChrysoberylBeAl2O4
Oⓘ CorundumAl2O3
Oⓘ EkaniteCa2ThSi8O20
Oⓘ GrossularCa3Al2(SiO4)3
Oⓘ Grossular var. HessoniteCa3Al2(SiO4)3
Oⓘ Corundum var. SapphireAl2O3
Oⓘ SillimaniteAl2(SiO4)O
Oⓘ SpinelMgAl2O4
Oⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
Oⓘ ZirconZr(SiO4)
Oⓘ Garnet GroupX3Z2(SiO4)3
Oⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
MgMagnesium
Mgⓘ SpinelMgAl2O4
AlAluminium
Alⓘ ChrysoberylBeAl2O4
Alⓘ CorundumAl2O3
Alⓘ GrossularCa3Al2(SiO4)3
Alⓘ Grossular var. HessoniteCa3Al2(SiO4)3
Alⓘ Corundum var. SapphireAl2O3
Alⓘ SillimaniteAl2(SiO4)O
Alⓘ SpinelMgAl2O4
SiSilicon
Siⓘ EkaniteCa2ThSi8O20
Siⓘ GrossularCa3Al2(SiO4)3
Siⓘ Grossular var. HessoniteCa3Al2(SiO4)3
Siⓘ SillimaniteAl2(SiO4)O
Siⓘ ZirconZr(SiO4)
Siⓘ Garnet GroupX3Z2(SiO4)3
Siⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
CaCalcium
Caⓘ EkaniteCa2ThSi8O20
Caⓘ GrossularCa3Al2(SiO4)3
Caⓘ Grossular var. HessoniteCa3Al2(SiO4)3
ZrZirconium
Zrⓘ ZirconZr(SiO4)
ThThorium
Thⓘ EkaniteCa2ThSi8O20

Other Databases

Wikipedia:https://ceb.wikipedia.org/wiki/Okkampitiya
Wikidata ID:Q27457544

Other Regions, Features and Areas containing this locality

AsiaContinent
Indian Plate (India Plate)Tectonic 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.

References

Mathavan, V., Kalubandara, S. T., Fernando, G.W.A.R. (2000) Occurrences of two new types of gem deposits in the Okkampitiya gem field, Sri Lanka. The Journal of Gemmology, 27 (2) 65-72 doi:10.15506/jog.2000.27.2.65
Nasdala, Lutz, Corfu, Fernando, Blaimauer, Doris, Chanmuang, Chutimun, Ruschel, Katja, Škoda, Radek, Wildner, Manfred, Wirth, Richard, Zeug, Manuela, Zoysa, E. Gamini (2017) Neoproterozoic amorphous “ekanite” (Ca2Th0.9U0.1Si8O20) from Okkampitiya, Sri Lanka: A metamict gemstone with excellent lead-retention performance. Geology, 45 (10) 919-922 doi:10.1130/g39334.1
Quick NavTopMineral ListOther DatabasesOther RegionsReferences
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 1, 2026 22:50:13 Page updated: August 4, 2025 05:42:09
Go to top of page