Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Chlorite Group from
Biskupice Maars, Biskupice, Krnov, Bruntál District, Moravian-Silesian Region, Czech Republic


Locality type:Volcanic Center
Classification
Species:'Chlorite Group' (not an IMA approved species)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chlorite Group data
Locality Data:Click here to view Biskupice Maars, Biskupice, Krnov, Bruntál District, Moravian-Silesian Region, Czech Republic
Data Identifiers
Mindat Occurrence Record ID:1693207
Long-form Identifier:1:3:1693207:4
GUID (UUID V4):0
Nearest other occurrences of Chlorite Group
17.4km (10.8 miles) ⓘ'Dewon' phyllite quarry, Jarnołtówek, Gmina Głuchołazy, Nysa County, Opole Voivodeship, Poland
24.9km (15.5 miles) ⓘHorní Benešov mines, Horní Benešov, Bruntál District, Moravian-Silesian Region, Czech Republic
25.1km (15.6 miles) ⓘVidly deposit, Vidly, Vrbno pod Pradědem, Bruntál District, Moravian-Silesian Region, Czech Republic
28.8km (17.9 miles) ⓘPraděd Mountain, Malá Morávka, Bruntál District, Moravian-Silesian Region, Czech Republic
29.4km (18.2 miles) ⓘBukovice quarry, Bukovice, Jeseník, Jeseník District, Olomouc Region, Czech Republic
29.8km (18.5 miles) ⓘSławniowice, Gmina Głuchołazy, Nysa County, Opole Voivodeship, Poland
33.8km (21.0 miles) ⓘČertova stěna, Vernířovice, Šumperk District, Olomouc Region, Czech Republic
34.9km (21.7 miles) ⓘKeprník Hill, Šerák-Keprník National Nature Reservation, Ostružná, Jeseník District, Olomouc Region, Czech Republic
35.6km (22.1 miles) ⓘŠerák Hill, Šerák-Keprník National Nature Reservation, Ostružná, Jeseník District, Olomouc Region, Czech Republic
36.4km (22.6 miles) ⓘKočičí skalka, Vernířovice, Šumperk District, Olomouc Region, Czech Republic
References
Kašing, Martin, Jirásek, Jakub, Matýsek, Dalibor, Valenta, Jan, Rapprich, Vladislav, Tábořík, Petr, Pek, Tomáš (2025) Almost eroded but still there: Oldest diatreme volcanoes of pre-Quaternary age in the eastern Bohemian Massif, Czechia. Geomorphology, 475. doi:10.1016/j.geomorph.2025.109668
 
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