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

Fluorapophyllite-(K) from
O & G Southbury Quarry (Silliman Quarry; O & G No. 2 Quarry), Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA


Locality type:Quarry
Classification
Species:Fluorapophyllite-(K)
Formula:KCa4(Si8O20)(F,OH) · 8H2O
Formation:Secondary
Comments:Crystals can reach 2-3 cm, though commonly 1 cm or less. The tips of the pyramids are typically physically degraded and milky, leading to the term "snow-cone" habit for these crystals. 2018 SEM-EDS analyses or three samples has confirmed the "-(K)" nature of these crystals, but not whether they are "fluor" or "hydroxy".
Habit:bipyramidal
Colour:colorless to white
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Common
Confirmation
Validity:Confirmed
Confirmation Methods:SEM-EDS
Associated Minerals Based on Photo Data:
Prehnite54
Calcite15
Pumpellyite Group11
Quartz4
Datolite3
Anhydrite3
Chabazite-Ca1
Data
Mineral Data:Click here to view Fluorapophyllite-(K) data
Locality Data:Click here to view O & G Southbury Quarry (Silliman Quarry; O & G No. 2 Quarry), Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
Photo GalleryView Gallery (29 photos)
Data Identifiers
Mindat Occurrence Record ID:37820
Long-form Identifier:1:3:37820:2
GUID (UUID V4):0
Nearest other occurrences of Fluorapophyllite-(K)
3.6km (2.2 miles) O & G Woodbury Traprock Quarry (Orenaug Quarry; O & G No. 1 Quarry), Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
29.5km (18.3 miles) Pine Rock Quarry (Farnham Quarry), Hamden, New Haven County, Connecticut, USA
38.3km (23.8 miles) Farm River Rock Quarry, East Haven, New Haven County, Connecticut, USA
40.1km (24.9 miles) North Branford Quarry, North Branford, New Haven County, Connecticut, USA
40.6km (25.3 miles) Reed's Gap Quarry (New Haven Trap Rock quarry; Tilcon Durham quarry), Durham, Middlesex County, Connecticut, USA
46.5km (28.9 miles) 2368-2384 Berlin Turnpike (Former Hartford Drive-In), Newington, Hartford County, Connecticut, USA
47.7km (29.6 miles) Balf Quarry, Newington, Hartford County, Connecticut, USA
61.5km (38.2 miles) Roncari Quarry, East Granby, Hartford County, Connecticut, USA
81.5km (50.6 miles) Hampden quarry, West Springfield, Hampden County, Massachusetts, USA
95.3km (59.2 miles) Mount Tom Quarry, Mount Tom, Holyoke, Hampden County, Massachusetts, USA
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: September 3, 2026 15:26:21
Go to top of page