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!
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

An Gearna, Ben More, Isle of Mull, Argyll and Bute, Scotland, UKi
Regional Level Types
An GearnaOccurrence
Ben MoreMountain
Isle of MullIsland
Argyll and ButeCouncil Area
ScotlandCountry
UKCountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
01199170017272007788527.jpg
Scolecite

An Gearna, Ben More, Isle of Mull, Argyll and Bute, Scotland, UK
02720250017272007799972.jpg
Epidote, etc.

An Gearna, Ben More, Isle of Mull, Argyll and Bute, Scotland, UK
02613990017272007802884.jpg
Prehnite, etc.

An Gearna, Ben More, Isle of Mull, Argyll and Bute, Scotland, UK
01199170017272007788527.jpg
Scolecite

An Gearna, Ben More, Isle of Mull, Argyll and Bute, Scotland, UK
02720250017272007799972.jpg
Epidote, etc.

An Gearna, Ben More, Isle of Mull, Argyll and Bute, Scotland, UK
02613990017272007802884.jpg
Prehnite, etc.

An Gearna, Ben More, Isle of Mull, Argyll and Bute, Scotland, UK
01199170017272007788527.jpg
Scolecite

An Gearna, Ben More, Isle of Mull, Argyll and Bute, Scotland, UK
01870130017272007873872.jpg
Epidote, etc.

An Gearna, Ben More, Isle of Mull, Argyll and Bute, Scotland, UK
Latitude & Longitude (WGS84):
56° 26' 22'' North , 6° 2' 41'' West
Latitude & Longitude (decimal):
56.43969,-6.04490
GeoHash:
G#: gf59n6w1p
GRN:
N38W03
UK National Grid Reference:
NM527362
Type:
Occurrence
Köppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Isle Of Mull2,667 (2014)16.7km
Tobermory1,010 (2017)20.3km
Isle of Iona125 (2015)25.8km
Isle of Colonsay108 (2012)41.2km
Mindat Locality ID:
2942
Long-form identifier:
mindat:1:2:2942:4
GUID (UUID V4):
0
Other/historical names associated with this locality:
Argyllshire


A zeolite and associated minerals occurrence on a ridge on An Gearna..

"One of the most convenient places for studying the mineralogy of the lavas is the ridge of An Gearna referred to above. On the north-eastern slope at a height of about 1200 feet, large amygdales, filled chiefly with a white fibrous zeolite, make their appearance in the screes and become plentiful at heights of 1300-1500 feet. The size of these amygdales is phenomenal, measuring, as they do, as much as 15 cm. x 10 cm. It is noteworthy that the lavas of the upper part of the hill alone yield the zeolite-filled vesicles ; the amygdales in the lower lavas are small and are filled mostly with compact, massive albite. The fibrous zeolite is scolecite, and associated with it are epidote, prehnite, garnet, albite, and, much more rarely, hornblende, calcite,
chabazite, and thomsonite."

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:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Calcite
Formula: CaCO3
ⓘ 'Chabazite'
ⓘ Chamosite
Formula: (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
ⓘ Clinochlore var. Corundophilite
Formula: (Mg,Fe,Al)6(Si,Al)4O10(OH)8
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ Prehnite
Formula: Ca2Al2Si3O10(OH)2
ⓘ Scolecite
Formula: CaAl2Si3O10 · 3H2O
ⓘ 'Thomsonite Subgroup'
ⓘ 'Zeolite Group'

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 9 - Silicates
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘPrehnite9.DP.20Ca2Al2Si3O10(OH)2
ⓘChamosite9.EC.55(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
ⓘClinochlore
var. Corundophilite		9.EC.55(Mg,Fe,Al)6(Si,Al)4O10(OH)8
ⓘAlbite9.FA.35Na(AlSi3O8)
ⓘ'Zeolite Group'9.G0.
ⓘScolecite9.GA.05CaAl2Si3O10 · 3H2O
Unclassified
ⓘ'Chabazite'-
ⓘ'Hornblende Root Name Group'-◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ'Garnet Group'-X3Z2(SiO4)3
ⓘ'Thomsonite Subgroup'-

List of minerals for each chemical element

HHydrogen
Hⓘ Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Hⓘ Clinochlore var. Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ PrehniteCa2Al2Si3O10(OH)2
Hⓘ ScoleciteCaAl2Si3O10 · 3H2O
Hⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ CalciteCaCO3
Oⓘ Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Oⓘ Clinochlore var. Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ PrehniteCa2Al2Si3O10(OH)2
Oⓘ ScoleciteCaAl2Si3O10 · 3H2O
Oⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Oⓘ Garnet GroupX3Z2(SiO4)3
FFluorine
Fⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
MgMagnesium
Mgⓘ Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Mgⓘ Clinochlore var. Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Alⓘ Clinochlore var. Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ PrehniteCa2Al2Si3O10(OH)2
Alⓘ ScoleciteCaAl2Si3O10 · 3H2O
Alⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Siⓘ Clinochlore var. Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ PrehniteCa2Al2Si3O10(OH)2
Siⓘ ScoleciteCaAl2Si3O10 · 3H2O
Siⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Siⓘ Garnet GroupX3Z2(SiO4)3
ClChlorine
Clⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ PrehniteCa2Al2Si3O10(OH)2
Caⓘ ScoleciteCaAl2Si3O10 · 3H2O
Caⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
FeIron
Feⓘ Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Feⓘ Clinochlore var. Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)

Other Regions, Features and Areas containing this locality

British and Irish IslesGroup of Islands
Eurasian PlateTectonic Plate
EuropeContinent
North Atlantic Igneous ProvinceLarge Igneous Province
UK

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

[1]McLintock, W.F.P. (1915) On the Zeolites and associated minerals from the Tertiary lavas around Ben More, Mull. Transactions of the Royal Society of Edinburgh, Vol.LI-Part I- (No.1), 33 pages plus plates.
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: September 3, 2026 02:33:50 Page updated: August 21, 2025 04:59:53
Go to top of page