Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Ani Island (Anijima), Chichijima Group, Ogasawara Islands, Ogasawara Subprefecture, Tokyo Metropolis, Japani
Regional Level Types
Ani Island (Anijima)Island
Chichijima Group- not defined -
Ogasawara IslandsGroup of Islands
Ogasawara SubprefectureSubprefecture
Tokyo MetropolisPrefecture
JapanCountry

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Type:
Island
Mindat Locality ID:
32375
Long-form identifier:
mindat:1:2:32375:5
GUID (UUID V4):
0


Boninite. Also andesite cut by chalcedony veins.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

7 valid minerals.

Rock Types Recorded

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

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

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Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Celadonite
Formula: K(MgFe3+◻)(Si4O10)(OH)2
ⓘ Clinoenstatite
Formula: MgSiO3
ⓘ Enstatite
Formula: Mg2Si2O6
ⓘ Enstatite var. Bronzite
Formula: (Mg,Fe2+)2[SiO3]2
ⓘ 'Erionite Subgroup'
Formula: M2[Al4Si14O36] · 15H2O
ⓘ 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
ⓘ Quartz var. Chalcedony
Formula: SiO2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘQuartz
var. Chalcedony		4.DA.05SiO2
ⓘ4.DA.05SiO2
Group 9 - Silicates
ⓘEnstatite9.DA.05Mg2Si2O6
ⓘvar. Bronzite9.DA.05(Mg,Fe2+)2[SiO3]2
ⓘClinoenstatite9.DA.10MgSiO3
ⓘ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
ⓘ'Erionite Subgroup'-M2[Al4Si14O36] · 15H2O
ⓘ'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ⓘ Erionite SubgroupM2[Al4Si14O36] · 15H2O
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ⓘ Quartz var. ChalcedonySiO2
Oⓘ ClinoenstatiteMgSiO3
Oⓘ EnstatiteMg2Si2O6
Oⓘ Erionite SubgroupM2[Al4Si14O36] · 15H2O
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ⓘ ClinoenstatiteMgSiO3
Mgⓘ EnstatiteMg2Si2O6
Mgⓘ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
AlAluminium
Alⓘ Erionite SubgroupM2[Al4Si14O36] · 15H2O
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ⓘ Quartz var. ChalcedonySiO2
Siⓘ ClinoenstatiteMgSiO3
Siⓘ EnstatiteMg2Si2O6
Siⓘ Erionite SubgroupM2[Al4Si14O36] · 15H2O
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

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

Localities in this Region

Japan
  • Tokyo Metropolis

Other Regions, Features and Areas that Intersect

Eurasian Plate
Philippine Sea PlateTectonic Plate

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