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
Minerals 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

Felsite

A rock subtype
This page is currently not sponsored. Click here to sponsor this page.
04424970017271952569309.jpg
Felsite

Green Cleugh, Pentland Hills, Midlothian, Scotland, UK
04424970017271952569309.jpg
Felsite

Green Cleugh, Pentland Hills, Midlothian, Scotland, UK
01600200017271952573651.jpg
Felsite

Green Cleugh, Pentland Hills, Midlothian, Scotland, UK
Hide all sections | Show all sections

About FelsiteHide

A field term for any light-colored, fine-grained or aphanitic extrusive or hypabyssal rock, with or without phenocrysts, and composed chiefly of quartz and feldspar; generally microcrystalline rocks of granitic composition.

The term was initially used for the microcrystalline groundmass of a porphyry.

The name had also previously been used by Kirwan (1794) for a microcrystalline variety of feldspar.

Synonyms: felstone

Compare with: felsophyre , aphanite


Unique IdentifiersHide

Mindat ID:
48445
Long-form identifier:
mindat:1:1:48445:7

Similar NamesHide

FeliteA synonym of Larnite
FelseidA rock subtype

Classification of FelsiteHide

Sub-divisions of FelsiteHide

Synonyms of FelsiteHide

Common AssociatesHide

Associations Based on Photo Data:
5 photos of Felsite associated with Native CopperCu
4 photos of Felsite associated with 'Conglomerate'
2 photos of Felsite associated with 'Sandstone'

Internet Links for FelsiteHide

References for FelsiteHide

Quick NavTopAbout FelsiteUnique IdentifiersSimilar NamesClassification Sub-divisions SynonymsCommon AssociatesInternet Links References
 
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 13, 2026 15:07:13 Page updated: July 13, 2026 22:02:32
Go to top of page