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

Gypsum from
Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA


00587280017272041849185.jpg
Gypsum

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
08004480017362752114148.jpg
Gypsum

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
02046490017272014492038.jpg
Gypsum

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
06068640017362752132982.jpg
Gypsum

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
00587280017272041849185.jpg
Gypsum

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
08004480017362752114148.jpg
Gypsum

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
03051200017272041869461.jpg
Gypsum

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
06068640017362752132982.jpg
Gypsum

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
00587280017272041849185.jpg
Gypsum

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
03210900017362752153673.jpg
Gypsum

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
02046490017272014492038.jpg
Gypsum

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
02414900017362752166144.jpg
Gypsum

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
Locality type:Quarry
Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Comments:Schooner (1958) reports it as clusters of very delicate white or gray crystals on protected ledges of schist and gneiss.
Habit:crusts of microcrystals
Colour:white to gray
Quality for species:Poor for species, only of interest for locality collectors. (#)
Abundance at site:Rare
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:96205
Long-form Identifier:1:3:96205:6
GUID (UUID V4):0
Nearest other occurrences of Gypsum
3.0km (1.8 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
3.8km (2.3 miles) ⓘState Forest Quarry No. 2, Cobalt, East Hampton, Middlesex County, Connecticut, USA
8.7km (5.4 miles) ⓘWorth and Selden Quarries (Victoria Quarry), East Hampton, Middlesex County, Connecticut, USA
9.3km (5.7 miles) ⓘLinkpot cut, Airline Railroad, East Hampton, Middlesex County, Connecticut, USA
13.0km (8.1 miles) ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
16.0km (10.0 miles) ⓘSherrill Street quarry, New Britain, Hartford County, Connecticut, USA
17.3km (10.7 miles) ⓘMeriden Trap Rock Quarry (Lane's Quarry), Meriden, New Haven County, Connecticut, USA
18.1km (11.2 miles) ⓘReed's Gap Quarry (New Haven Trap Rock quarry; Tilcon Durham quarry), Durham, Middlesex County, Connecticut, USA
19.2km (11.9 miles) ⓘPillow lava locality, Meriden, New Haven County, Connecticut, USA
19.6km (12.2 miles) ⓘState Route 9 & State Route 71 Interchange, New Britain, Hartford County, Connecticut, USA
References
Ralph Lieser of Pappy’s Beryl Shop, East Hampton
and Howard Pate of Fluorescent House, Branford, Connecticut.
Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner
 
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 13:43:43
Go to top of page