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!
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Opal from
Valeč Hyalite occurrences, Valeč, Karlovy Vary District, Karlovy Vary Region, Czech Republic


Locality type:Occurrence
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Opal2
- var Opal-AN2
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Valeč Hyalite occurrences, Valeč, Karlovy Vary District, Karlovy Vary Region, Czech Republic
Photo GalleryView Gallery (10 photos)
Data Identifiers
Mindat Occurrence Record ID:985122
Long-form Identifier:1:3:985122:1
GUID (UUID V4):0
Nearest other occurrences of Opal
24.2km (15.0 miles) Nástup Quarry, Tušimice, Kadaň, Chomutov District, Ústí nad Labem Region, Czech Republic
27.3km (17.0 miles) Nadějná, Měděnec, Chomutov District, Ústí nad Labem Region, Czech Republic
27.7km (17.2 miles) Libous quarry, Březno, Chomutov District, Ústí nad Labem Region, Czech Republic
28.3km (17.6 miles) Ahníkov pyroxenite outcrop, Ahníkov, Málkov, Chomutov District, Ústí nad Labem Region, Czech Republic
33.5km (20.8 miles) Straßburger Glück Mine, Niederschlag, Bärenstein, Erzgebirgskreis, Saxony, Germany
38.8km (24.1 miles) Jeroným Mine, Čistá, Rovná, Sokolov District, Karlovy Vary Region, Czech Republic
42.2km (26.2 miles) Marie Terezie vein, Potůčky, Karlovy Vary District, Karlovy Vary Region, Czech Republic
44.9km (27.9 miles) Pöhla-Tellerhäuser Mine, Pöhla, Schwarzenberg, Erzgebirgskreis, Saxony, Germany
45.7km (28.4 miles) Prospect 24, Pöhla, Schwarzenberg, Erzgebirgskreis, Saxony, Germany
47.4km (29.4 miles) Korozluky magmatic rock occurrence (Kolosoruk magmatic rock occurrence; Kolloseruk magmatic rock occurrence), Korozluky, Most District, Ústí nad Labem Region, Czech Republic
References
 
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