Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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Chalcedony from
Jańska Góra (Polna Góra), Piotrówek, Gmina Jordanów Śląski, Wrocław County, Lower Silesian Voivodeship, Poland


Locality type:Mountain
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 Jańska Góra (Polna Góra), Piotrówek, Gmina Jordanów Śląski, Wrocław County, Lower Silesian Voivodeship, Poland
Data Identifiers
Mindat Occurrence Record ID:1577316
Long-form Identifier:1:3:1577316:4
GUID (UUID V4):0
Nearest other occurrences of Chalcedony
4.3km (2.7 miles) ⓘJordanów nephrite quarry, Gmina Jordanów Śląski, Wrocław County, Lower Silesian Voivodeship, Poland
10.5km (6.5 miles) ⓘMount Kopaniec, Sobótka, Gmina Sobótka, Wrocław County, Lower Silesian Voivodeship, Poland
13.6km (8.5 miles) ⓘJanowiczki quarry, Czerwieniec, Gmina Kondratowice, Strzelin County, Lower Silesian Voivodeship, Poland
14.2km (8.8 miles) ⓘ'Wiry' magnesite mine, Wirki, Gmina Marcinowice, Świdnica County, Lower Silesian Voivodeship, Poland
19.3km (12.0 miles) ⓘKoźmickie Wzgórze - Mühlberg, Gmina Ciepłowody, Ząbkowice Śląskie County, Lower Silesian Voivodeship, Poland
20.9km (13.0 miles) ⓘSzklary nickel deposit, Szklary, Gmina Ząbkowice Śląskie, Ząbkowice Śląskie County, Lower Silesian Voivodeship, Poland
21.0km (13.0 miles) ⓘSzklary Chrysoprase Mine, Szklary, Gmina Ząbkowice Śląskie, Ząbkowice Śląskie County, Lower Silesian Voivodeship, Poland
28.7km (17.9 miles) ⓘPrzeworno marble quarry, Przeworno, Gmina Przeworno, Strzelin County, Lower Silesian Voivodeship, Poland
32.7km (20.3 miles) ⓘMagnezyty „Grochów” S.A. mine, Grochowa, Gmina Bardo, Ząbkowice Śląskie County, Lower Silesian Voivodeship, Poland
36.3km (22.6 miles) ⓘMount Łopianka, Wilcza, Gmina Kłodzko, Kłodzko County, Lower Silesian Voivodeship, Poland
References
Lis, Józef, Sylwestrzak, Hubert (1986) Minerały Dolnego Śląska [Minerals of the Lower Silesia]. Wydawnictwa Geologiczne.
 
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