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
Kolársky vrch deposit, Pezinok, Pezinok District, Bratislava 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 Kolársky vrch deposit, Pezinok, Pezinok District, Bratislava Region, Slovakia
Data Identifiers
Mindat Occurrence Record ID:26014
Long-form Identifier:1:3:26014:3
GUID (UUID V4):0
Nearest other occurrences of Opal
3.9km (2.4 miles) ⓘFerdinand and Augustín Mine, Pezinok, Pezinok District, Bratislava Region, Slovakia
21.8km (13.5 miles) ⓘLošonec Quarry, Lošonec, Trnava District, Trnava Region, Slovakia
31.0km (19.3 miles) ⓘHollitzer quarry, Pfaffenberg hill, Hainburg an der Donau, Bruck an der Leitha District, Lower Austria, Austria
84.2km (52.3 miles) ⓘBučník Hill Quarry, Komňa, Uherské Hradiště District, Zlín Region, Czech Republic
90.1km (56.0 miles) ⓘMochovce, Kalná nad Hronom, Levice District, Nitra Region, Slovakia
92.4km (57.4 miles) ⓘRohožnica, Veľký Ďur, Levice District, Nitra Region, Slovakia
References
Uher, Pavel, Michal, Silvio, Vitálos, Jirí (2000) The Pezinok Antimony Mine, Malé Karpaty Mountains, Slovakia. The Mineralogical Record, 31 (2) 153-162pp.153-162
 
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