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While externally similar shapes, these two minerals are very different inside.
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Chalcedony from
Iroco mine (Kori Chaka), Oruro, Cercado Province, Oruro, Bolivia


Locality type:Mine
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 Iroco mine (Kori Chaka), Oruro, Cercado Province, Oruro, Bolivia
Data Identifiers
Mindat Occurrence Record ID:467872
Long-form Identifier:1:3:467872:4
GUID (UUID V4):0
Nearest other occurrences of Chalcedony
2.5km (1.5 miles) ⓘItos Mine, Oruro, Cercado Province, Oruro, Bolivia
37.9km (23.6 miles) ⓘSanta Isabel Mine, Condeauque mining district (Conde Auque), Cercado Province, Oruro, Bolivia
38.8km (24.1 miles) ⓘJuliana Mine (Fenix Mine), Condeauque mining district (Conde Auque), Cercado Province, Oruro, Bolivia
70.7km (44.0 miles) ⓘIncuyo, Tapacari Province, Cochabamba, Bolivia
89.1km (55.4 miles) ⓘLili mine (Lomitas deposit; Alfonso Bedoya mine), Laurani District, Aroma Province, La Paz, Bolivia
References
USGS Bulletin # 1975, p. 269.
 
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