Log InRegister
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreOur ScienceMindat Newsletter [Free Download]Contact Us
Donate to MindatSponsor a PageCorporate SponsorshipSponsored Pages
Learning CenterWhat Is a Mineral?The Most Common Minerals on EarthInformation for EducatorsMindat ArticlesMindat Newsletter [Free Download]The ElementsThe Mineral Quiz
Search FormMinerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDMinerals by CountryAlphabetical Mineral IndexAlphabetical Locality SearchMineral Association SearchList of CountriesLocalities Near MePhoto SearchSearch ArticlesSearch GlossaryThe Rock H. Currier Digital LibraryMore Search Options
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
MineralsPetrologyFossilsMeteoritesGeologic Time
Mining CompaniesStatisticsMineral MuseumsClubs & OrganizationsMineral Shows & EventsDevice SettingsTime Machine
Read DiscussionsIdentification Request
Photo SearchPhoto GalleriesSearch by ColourPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Uguisu Beach, Ani Island (Anijima), Chichijima Group, Ogasawara Islands, Ogasawara Subprefecture, Tokyo Metropolis, Japani
Regional Level Types
Uguisu BeachOutcrop
Ani Island (Anijima)Island
Chichijima Group- not defined -
Ogasawara IslandsGroup of Islands
Ogasawara SubprefectureSubprefecture
Tokyo MetropolisPrefecture
JapanCountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
27° 7' 29'' North , 142° 11' 27'' East
Latitude & Longitude (decimal):
27.12494,142.19104
GRN:
N19E90
Type:
Outcrop
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Hutami897 (2010)4.8km
Mindat Locality ID:
420704
Long-form identifier:
mindat:1:2:420704:0
GUID (UUID V4):
0


The "okenite-like mineral" (Momma et al., 2015) may be a new mineral related to okenite.

Boninite and/or bronzite andesite dikes are present.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


6 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Celadonite
Formula: K(MgFe3+◻)(Si4O10)(OH)2
ⓘ Enstatite
Formula: Mg2Si2O6
ⓘ Enstatite var. Bronzite
Formula: (Mg,Fe2+)2[SiO3]2
ⓘ Fluorapophyllite-(K)
Formula: KCa4(Si8O20)(F,OH) · 8H2O
ⓘ 'Heulandite Subgroup'
Formula: (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
ⓘ Hydroxyapophyllite-(K)
Formula: KCa4(Si8O20)(OH,F) · 8H2O
ⓘ Okenite
Formula: Ca10Si18O46 · 18H2O
ⓘ 'Phillipsite Subgroup'
Formula: (Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
ⓘ Quartz
Formula: SiO2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 9 - Silicates
ⓘEnstatite9.DA.05Mg2Si2O6
ⓘvar. Bronzite9.DA.05(Mg,Fe2+)2[SiO3]2
ⓘFluorapophyllite-(K)9.EA.15KCa4(Si8O20)(F,OH) · 8H2O
ⓘHydroxyapophyllite-(K)9.EA.15KCa4(Si8O20)(OH,F) · 8H2O
ⓘOkenite9.EA.40Ca10Si18O46 · 18H2O
ⓘCeladonite9.EC.15K(MgFe3+◻)(Si4O10)(OH)2
Unclassified
ⓘ'Heulandite Subgroup'-(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
ⓘ'Phillipsite Subgroup'-(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O

List of minerals for each chemical element

HHydrogen
Hⓘ CeladoniteK(MgFe3+◻)(Si4O10)(OH)2
Hⓘ Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Hⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Hⓘ Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
Hⓘ OkeniteCa10Si18O46 · 18H2O
Hⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
OOxygen
Oⓘ CeladoniteK(MgFe3+◻)(Si4O10)(OH)2
Oⓘ EnstatiteMg2Si2O6
Oⓘ Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Oⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Oⓘ Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
Oⓘ OkeniteCa10Si18O46 · 18H2O
Oⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Oⓘ QuartzSiO2
Oⓘ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
FFluorine
Fⓘ Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Fⓘ Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
NaSodium
Naⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Naⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
MgMagnesium
Mgⓘ CeladoniteK(MgFe3+◻)(Si4O10)(OH)2
Mgⓘ EnstatiteMg2Si2O6
Mgⓘ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
AlAluminium
Alⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Alⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
SiSilicon
Siⓘ CeladoniteK(MgFe3+◻)(Si4O10)(OH)2
Siⓘ EnstatiteMg2Si2O6
Siⓘ Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Siⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Siⓘ Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
Siⓘ OkeniteCa10Si18O46 · 18H2O
Siⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Siⓘ QuartzSiO2
Siⓘ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
KPotassium
Kⓘ CeladoniteK(MgFe3+◻)(Si4O10)(OH)2
Kⓘ Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Kⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Kⓘ Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
Kⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
CaCalcium
Caⓘ Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Caⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Caⓘ Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
Caⓘ OkeniteCa10Si18O46 · 18H2O
Caⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
FeIron
Feⓘ CeladoniteK(MgFe3+◻)(Si4O10)(OH)2
Feⓘ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
BaBarium
Baⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O

Other Regions, Features and Areas containing this locality

Eurasian Plate
Philippine Sea PlateTectonic 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

Momma, Koichi, Takashi Sano, Toshiro Nagase, Ritsuro Miyawaki, and Satoshi Matsubara (2015) An okenite-like mineral from Anijima Island, Ogasawara Islands, Tokyo, Japan. Bull. Natl. Mus. Nat. Sci., Ser. C, 41, 45–52.
Quick NavTopMineral ListRock TypesOther 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: October 20, 2026 14:57:22 Page updated: January 24, 2026 10:49:51
Go to top of page