Oolite
A rock subtype
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An oolite is a sedimentary rock made of ooids (= ooliths), which are approximately spherical, concretionary grains, typically of calcium carbonate, but may be of iron oxides, clays, apatite, etc. Pisoids are between 2-10 mm in diameter, while ooids are <2 mm.
Ironstones (ooid-ironstone) and limestones (see ooid-limestone) often have a pisolitic structure.
i. A sedimentary rock, usually a limestone, made up chiefly of ooliths cemented together. The rock was originally termed 'oolith.' .
Synonym of: roestone, eggstone
Ref: AGI
ii. A term often used for oolith, or one of the ovoid particles of an oolite. Etymol. Greek oon, egg.
Ironstones (ooid-ironstone) and limestones (see ooid-limestone) often have a pisolitic structure.
i. A sedimentary rock, usually a limestone, made up chiefly of ooliths cemented together. The rock was originally termed 'oolith.' .
Synonym of: roestone, eggstone
Ref: AGI
ii. A term often used for oolith, or one of the ovoid particles of an oolite. Etymol. Greek oon, egg.
Unique Identifiers
Mindat ID:
51799
Long-form identifier:
mindat:1:1:51799:5
Similar Names
| Alite | A synonym of Halite | |
| Alite (of Törnebohm) | A synonym of Hatrurite | |
| Eolite | A synonym of Realgar | |
| Illite | A variety of Muscovite | K0.65Al2.0[Al0.65Si3.35O10](OH)2 |
| Iolite | A variety of Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| Jolite | A synonym of Cordierite | |
| Ollite | A synonym of Talc | |
| Ooite | A synonym of 'Ooid-limestone' | |
| Orlite | Pb3(UO2)3(Si2O7)2 · 6H2O | |
| Oösite |
Classification of Oolite
Common Associates
Internet Links for Oolite
mindat.org URL:
https://www.mindat.org/min-51799.html
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References for Oolite
Reference List:
Localities for Oolite
Showing 28 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Algeria | |
| Chebel et al. (2023) |
Canada | |
| Anderle et al. (1979) |
China | |
| Luo et al. (2026) |
| Zhang et al. (2026) |
| Yao et al. (2026) |
| Zhang et al. (2020) |
| Wang et al. (2025) |
| Cai et al. (2026) |
| Xu et al. (2025) +1 other reference |
| Ke et al. (2024) |
Ghana | |
| Addae et al. (2026) |
India | |
| Vijay Kumar et al. (2025) |
Iran | |
| Ahmadnejad et al. (2025) |
| Ahmadnejad et al. (2025) |
Ireland | |
| Doran et al. (2025) +1 other reference |
| Doran et al. (2022) | |
Italy | |
| Giorno et al. (2025) |
| Galdenzi (2025) |
Mexico | |
| Minera Autlan |
Morocco | |
| Zhao et al. (2024) | |
Namibia | |
| Laukamp (2006) |
Nepal | |
| Paudyal et al. (2023) |
Pakistan | |
| Khubab et al. (2025) |
Russia | |
| Belogub et al. (2026) |
Serbia | |
| Kovačević Galović et al. (2026) |
Slovakia | |
| Konečný et al. (2011) |
South Africa | |
| Baugaard et al. (2025) |
Turkey | |
| Ozturk et al. (2002) |
