LIVE REPORT! Munich Show 2026 - last updated 12 minutes ago. Click here to watch.
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
Search FormMinerals 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

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: October 22, 2026 14:27:58
Go to top of page