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
Tschiffely (Wheatlands) Aggregate Quarry, Montgomery County, Maryland, USA


Locality type:Quarry
Classification
Species:Quartz var: Chalcedony
Formula:SiO2
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view Tschiffely (Wheatlands) Aggregate Quarry, Montgomery County, Maryland, USA
Data Identifiers
Mindat Occurrence Record ID:1567181
Long-form Identifier:1:3:1567181:1
GUID (UUID V4):0
Nearest other occurrences of Chalcedony
5.4km (3.3 miles) ⓘHunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
38.8km (24.1 miles) ⓘBull Run Quarry, Conklin, Loudoun County, Virginia, USA
45.3km (28.2 miles) ⓘPatapsco Glen Construction Site, Woodlawn, Baltimore County, Maryland, USA
46.9km (29.2 miles) ⓘWeir Mine, Holbrook, Baltimore County, Maryland, USA
47.4km (29.5 miles) ⓘHarris Mine, Holbrook, Baltimore County, Maryland, USA
47.6km (29.5 miles) ⓘUnnamed Chalcedony occurrence [1], Holbrook, Baltimore County, Maryland, USA
47.8km (29.7 miles) ⓘUnnamed Ore Bank, Owings Mills, Baltimore County, Maryland, USA
47.8km (29.7 miles) ⓘChoate Mine, Owings Mills, Baltimore County, Maryland, USA
48.1km (29.9 miles) ⓘLord Baltimore Drive Quartz occurrence area, Windsor Mill, Baltimore County, Maryland, USA
50.0km (31.1 miles) ⓘDelight Quarry (Soldier's Delight Quarry; Dyer Quarry), Soldiers' Delight ridge, Delight, Baltimore County, Maryland, USA
References
Jat Thompson Collection
 
and/or  
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