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

Opal from
Banky, Banská Štiavnica, Banská Štiavnica District, Banská Bystrica Region, Slovakia


Locality type:Deposit
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Banky, Banská Štiavnica, Banská Štiavnica District, Banská Bystrica Region, Slovakia
Data Identifiers
Mindat Occurrence Record ID:996182
Long-form Identifier:1:3:996182:1
GUID (UUID V4):0
Nearest other occurrences of Opal
2.2km (1.4 miles) ⓘČervená Studňa, Banská Štiavnica, Banská Štiavnica District, Banská Bystrica Region, Slovakia
6.6km (4.1 miles) ⓘHliník nad Hronom rhyolite quarry, Hliník nad Hronom, Žiar nad Hronom District, Banská Bystrica Region, Slovakia
6.9km (4.3 miles) ⓘHodruša-Hámre mines, Hodruša-Hámre, Žarnovica District, Banská Bystrica Region, Slovakia
7.2km (4.5 miles) ⓘKremenisko, Banská Štiavnica, Banská Štiavnica District, Banská Bystrica Region, Slovakia
11.4km (7.1 miles) ⓘLadomerská Vieska quarry, Ladomerská Vieska, Žiar nad Hronom District, Banská Bystrica Region, Slovakia
12.8km (7.9 miles) ⓘŽarnovická Huta, Žarnovica, Žarnovica District, Banská Bystrica Region, Slovakia
14.3km (8.9 miles) ⓘStará Kremnička quarry, Stará Kremnička, Žiar nad Hronom District, Banská Bystrica Region, Slovakia
17.2km (10.7 miles) ⓘNová Baňa deposit, Nová Baňa, Žarnovica District, Banská Bystrica Region, Slovakia
18.2km (11.3 miles) ⓘIhráčska Píla wood opal occurrence, Jastrabá, Žiar nad Hronom District, Banská Bystrica Region, Slovakia
19.0km (11.8 miles) ⓘBrehy quarry, Tekovská Breznica, Žarnovica District, Banská Bystrica Region, Slovakia
References
Koděra, Miroslav; Kolektív, A. (1986) Topografická mineralógia Slovenska. Veda Vydavatel'stvo.
 
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 16:07:11
Go to top of page