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

Tremolite from
Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA


07531870017272022652781.jpg
Tremolite

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
01087010017370165885618.jpg
Tremolite

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
05237440017370165887389.jpg
Tremolite

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
07531870017272022652781.jpg
Tremolite

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
01087010017370165885618.jpg
Tremolite

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
05237440017370165887389.jpg
Tremolite

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
03253660017272022678970.jpg
Tremolite

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
01087010017370165885618.jpg
Tremolite

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
08782510017370165883708.jpg
Tremolite

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
Locality type:Quarry
Classification
Species:Tremolite
Formula:◻Ca2Mg5(Si8O22)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tremolite data
Locality Data:Click here to view Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:46619
Long-form Identifier:1:3:46619:0
GUID (UUID V4):0
Nearest other occurrences of Tremolite
5.4km (3.3 miles) ⓘTschiffely (Wheatlands) Aggregate Quarry, Montgomery County, Maryland, USA
24.5km (15.2 miles) ⓘBrighton Dam Road Quarry (Howard-Montgomery Quarry), Howard County, Maryland, USA
26.4km (16.4 miles) ⓘHighway 50 intersection, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
35.9km (22.3 miles) ⓘVeasco Quarry (MRDS - 10276445), Oatlands, Loudoun County, Virginia, USA
36.3km (22.6 miles) ⓘBull Run Quarry, Conklin, Loudoun County, Virginia, USA
45.1km (28.0 miles) ⓘMarriottsville Quarry, Hernwood, Baltimore County, Maryland, USA
46.2km (28.7 miles) ⓘBok Asbestos Mine, Hollofield, Baltimore County, Maryland, USA
46.5km (28.9 miles) ⓘPatapsco Glen Construction Site, Woodlawn, Baltimore County, Maryland, USA
47.6km (29.6 miles) ⓘMineral Hill Mine, Louisville, Carroll County, Maryland, USA
57.2km (35.5 miles) ⓘMcMahon Quarry (Greenspring Quarry), Pikesville, Baltimore County, Maryland, USA
References
Bernstein, Lawrence R. (1980) Minerals of the Washington, D.C. Area - Issue 5 of Educational series, Maryland Geological Survey. Department of Natural Resources, Maryland Geological Survey. p.1-148.
 
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 13:48:09
Go to top of page