Vote for your favorite mineral in #MinCup26! - Arsenuranylite vs. Talc
It's a pair of soft and lovely minerals as Stichtite and Talc compete 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

Chalcedony from
Pennsylvania Mine [1] (Pennsylvania Consolidated Qtz; Pennsylvania-W.Y.O.D.; Pennsylvania vein; Pennsylvania-Wyod; Wyod), Empire Star group (Empire Star Mines Company holdings), Grass Valley, Grass Valley Mining District, Nevada County, California, USA


Locality type:Mine
Classification
Species:Quartz var: Chalcedony
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view Pennsylvania Mine [1] (Pennsylvania Consolidated Qtz; Pennsylvania-W.Y.O.D.; Pennsylvania vein; Pennsylvania-Wyod; Wyod), Empire Star group (Empire Star Mines Company holdings), Grass Valley, Grass Valley Mining District, Nevada County, California, USA
Data Identifiers
Mindat Occurrence Record ID:947755
Long-form Identifier:1:3:947755:1
GUID (UUID V4):0
Nearest other occurrences of Chalcedony
1.0km (0.6 miles) ⓘGolden Center Mine (Garage vein; Sleep vein; Church Hill vein), Golden Center group (Cabin Flat Mine; Rock Roche Mine; Dromedary Mine; Scotia Mine; Peabody Mine; Garage/Dromedary/Berriman/Peabody), Grass Valley, Grass Valley Mining District, Nevada County, California, USA
3.1km (1.9 miles) ⓘAllison Ranch Quartz Mine (Allison Ranch Mine; Allison Ranch vein; Allison Ranch Qtz.; Crossus Consolidated Mine; Stanton Mine), La Barr Meadows, Grass Valley Mining District, Nevada County, California, USA
32.3km (20.1 miles) ⓘRoye-Sum Mine, Mack House, Alleghany Mining District (Forest Mining District), Sierra County, California, USA
33.9km (21.1 miles) ⓘ16 to 1 Mine (Sixteen-to-One Mine; Original Sixteen-to-One Mine), Alleghany, Alleghany Mining District (Forest Mining District), Sierra County, California, USA
34.4km (21.4 miles) ⓘSpanish Mine [1] (Central Consolidated Mine; Central Cons.; Spanish & Humbug Cons. claims; Humbug Mine; Spanish vein), Ophir, Ophir Mining District (Auburn Mining District; Duncan Hill Mining District), Placer County, California, USA
34.5km (21.4 miles) ⓘEvans prospect (Oak), Forest, Alleghany Mining District (Forest Mining District), Sierra County, California, USA
34.6km (21.5 miles) ⓘOak Mine (Evans Mine), Forest, Alleghany Mining District (Forest Mining District), Sierra County, California, USA
35.8km (22.2 miles) ⓘOphir Mining District (Auburn Mining District; Duncan Hill Mining District), Placer County, California, USA
42.7km (26.5 miles) ⓘSteep Hollow claims, Rogerville, Feather Falls Mining District, Butte County, California, USA
80.0km (49.7 miles) ⓘChrysoprase and Moss Opal deposits, River Pines, Fiddletown Mining District (Oleta Mining District), Amador County, California, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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 8, 2026 08:36:43
Go to top of page