Locality type: | Outcrop |
Classification |
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Species: | Opal |
Formula: | SiO2 · nH2O |
Confirmation |
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Validity: | Believed Valid |
Data |
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Mineral Data: | Click here to view Opal data |
Locality Data: | Click here to view Calçadinha farm, Nazaré do Piauí, Piauí, Brazil |
Data Identifiers |
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Mindat Occurrence Record ID: | 1488717 |
Long-form Identifier: | 1:3:1488717:8 |
GUID (UUID V4): | c3082ee2-6f39-4f34-b8bd-0209c218e46f |
References |
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Costa, M. L. D., Alencar, Q. D. S., Gomes, E. R., Almeida, H. D. F. D., & Oliveira, S. K. D. (2016). Textural patterns, mineralogy, and chemistry of sandstone-related Calçadinha chalcedony (Piauí, Brazil). Brazilian Journal of Geology, 46(3), 395-409. |