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Pedro II, Piauí, Brazili
Regional Level Types
Pedro IIMunicipality

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Locality type:
Largest Settlements:
Pedro II22,038 (2012)
Other Languages:
Pedro II, Piauí, Brésil
Pedro II, Piauí, Brasilien
Pedro II, Piauí, Brasile
Pedro II, Piauí, Brasil
Педру-II , Пиауи, Бразилия
Simplified Chinese:
佩德罗二世城, 皮奧伊, 巴西
Pedro II, Piauí, Brasil
Pedro II , Piauí, Brasil
Bishnupriya Manipuri:
পেড্রো ঈ, পিয়াউই, ব্রাজিল
Pedro II , Piauí, Brasil
Pedro II, Piauí, Brazilië
პედრუ II , პიაუი, ბრაზილია
Pedro II, Piauí, Brazília
Minnan / Hokkien-Taiwanese:
Pedro II, Piauí, Pa-se
Pedro II, Piauí, Brasil
Pedro II , Piauí, Brasilien
Pedro II, Piauí, Brasil
Pedro II, Piauí, Brasilän
Pedro II, Piauí, Brasil

An area with precious opal, reportedly discovered by J.R. Sauer in 1960.

Potch opal, white opal, black opal, gray opal, semi-black opal, rolling flash, broad flash opal, exploding flash opal, mackerel sky opal, flame opal, flash-of-fire opal, harlequin opal, floral pattern opal, pinfire opal.

"Other occurrences in the Pedro II district are Cantinho, Bom Lugar, Limão, Centro, Mamoeiro, Morro do Meio and Barra." [Sauer, 1982, p. 70]

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

2 valid minerals.

Detailed Mineral List:

Formula: SiO2 · nH2O
Localities: Reported from at least 15 localities in this region.
Opal var: Black Opal
Formula: SiO2 · nH2O
Reference: Sauer, J.R. (1982) Brazil, Paradise of Gemstones. Gemological Institute of America, 135 pp. (p. 70).
Opal var: Precious Opal
Formula: SiO2 · nH2O
Reference: Sauer, Jules Roger (1982) Brazil, Paradise of Gemstones. Gemological Institute of America, 135 pp. (p. 3).
Formula: SiO2
Reference: Beih. z. Eur. J. Mineral 18 (2006) 49
Quartz var: Amethyst
Formula: SiO2
Reference: Beih. z. Eur. J. Mineral 18 (2006) 49
Quartz var: Chalcedony
Formula: SiO2
Reference: Beih. z. Eur. J. Mineral 18 (2006) 49
Quartz var: Rock Crystal
Formula: SiO2
Reference: Beih. z. Eur. J. Mineral 18 (2006) 49

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Opal4.DA.10SiO2 · nH2O
var: Black Opal4.DA.10SiO2 · nH2O
var: Precious Opal4.DA.10SiO2 · nH2O
var: Amethyst4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
var: Rock Crystal4.DA.05SiO2

List of minerals arranged by Dana 8th Edition classification

Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Unclassified Minerals, Mixtures, etc.
var: Black Opal-SiO2 · nH2O
var: Precious Opal-SiO2 · nH2O
var: Amethyst
var: Chalcedony-SiO2
var: Rock Crystal-SiO2

List of minerals for each chemical element

H OpalSiO2 · nH2O
H Opal (var: Precious Opal)SiO2 · nH2O
H Opal (var: Black Opal)SiO2 · nH2O
O Quartz (var: Chalcedony)SiO2
O Quartz (var: Rock Crystal)SiO2
O Quartz (var: Amethyst)SiO2
O OpalSiO2 · nH2O
O QuartzSiO2
O Opal (var: Precious Opal)SiO2 · nH2O
O Opal (var: Black Opal)SiO2 · nH2O
Si Quartz (var: Chalcedony)SiO2
Si Quartz (var: Rock Crystal)SiO2
Si Quartz (var: Amethyst)SiO2
Si OpalSiO2 · nH2O
Si QuartzSiO2
Si Opal (var: Precious Opal)SiO2 · nH2O
Si Opal (var: Black Opal)SiO2 · nH2O


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Sauer, J.R. (1982) Brazil, Paradise of Gemstones. Gemological Institute of America, 135 pp. (pp. 3, 68, 70-71).
Beiheft zu European Journal of Mineralogy 18 (2006) 49.
de Brito Barreto, S. and Bretas Bittar, S.M. (2010) Los depósitos de gemas de Brasil: localización, producción e impacto económico. Boletín de la Sociedad Geológica Mexicana, 62(1), 123-140.

Other Databases

Wikidata ID:Q1934329
GeoNames ID:3392431

Localities in this Region

Other Regions, Features and Areas that Intersect

South America PlateTectonic Plate

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