Vote for your favorite mineral in #MinCup26! - Cuprite vs. Orpiment
It's a fiery match of vibrant red Cuprite and just as saturated orange Orpiment battle for 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

Ferro-hornblende from
Aggregate Industries Quarry (Bayer-Mingolla Quarry; Trimount Quarry), Ashland, Middlesex County, Massachusetts, USA


09996340017339890847155.jpg
Ferro-hornblende

Aggregate Industries Quarry, Ashland, Middlesex County, Massachusetts, USA
00760320017271982581616.jpg
Ferro-hornblende, etc.

Aggregate Industries Quarry, Ashland, Middlesex County, Massachusetts, USA
00853150017272039351305.jpg
Ferro-hornblende

Aggregate Industries Quarry, Ashland, Middlesex County, Massachusetts, USA
00760320017271982581616.jpg
Ferro-hornblende, etc.

Aggregate Industries Quarry, Ashland, Middlesex County, Massachusetts, USA
09996340017339890847155.jpg
Ferro-hornblende

Aggregate Industries Quarry, Ashland, Middlesex County, Massachusetts, USA
00760320017271982581616.jpg
Ferro-hornblende, etc.

Aggregate Industries Quarry, Ashland, Middlesex County, Massachusetts, USA
Locality type:Quarry
Classification
Species:Ferro-hornblende
Formula:◻Ca2(Fe42+Al)(Si7Al)O22(OH)2
Habit:good prismatic crystals
Colour:black
Abundance at site:Common
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified, SEM-EDS
Associated Minerals Based on Photo Data:
Chamosite1
Data
Mineral Data:Click here to view Ferro-hornblende data
Locality Data:Click here to view Aggregate Industries Quarry (Bayer-Mingolla Quarry; Trimount Quarry), Ashland, Middlesex County, Massachusetts, USA
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:569971
Long-form Identifier:1:3:569971:1
GUID (UUID V4):0
Nearest other occurrences of Ferro-hornblende
26.1km (16.2 miles) ⓘSneech Pond copper mines (Copper Mine Hill), Cumberland, Providence County, Rhode Island, USA
34.4km (21.4 miles) ⓘConklin Quarry, Lime Rock, Lincoln, Providence County, Rhode Island, USA
78.2km (48.6 miles) ⓘAcushnet Quarry, Acushnet, Bristol County, Massachusetts, USA
78.3km (48.6 miles) ⓘJoppa Hill, Amherst, Hillsborough County, New Hampshire, USA
91.3km (56.7 miles) ⓘWheeler Mountain, Winchester, Cheshire County, New Hampshire, USA
References
Cristofono, Peter (n.d.) Personal communication.
 
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 5, 2026 15:06:12
Go to top of page