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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Opal from
Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal


03843370017362088556834.jpg
Opal-AN, etc.

Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
00743630017272007579029.jpg
Opal-AN, etc.

Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
04803800017272007583490.jpg
Opal-AN

Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
05966380017272007591906.jpg
Opal-AN, etc.

Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
03843370017362088556834.jpg
Opal-AN, etc.

Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
09908550017363342127701.jpg
Opal-AN, etc.

Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
06352280017362088546771.jpg
Opal-AN

Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
05966380017272007591906.jpg
Opal-AN, etc.

Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
02615880017363342139022.jpg
Opal-AN, etc.

Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
01632810017272007614285.jpg
Opal-AN, etc.

Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
04803800017272007583490.jpg
Opal-AN

Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
05966380017272007591906.jpg
Opal-AN, etc.

Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
Locality type:Quarry
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
Data Identifiers
Mindat Occurrence Record ID:992471
Long-form Identifier:1:3:992471:0
GUID (UUID V4):0
Nearest other occurrences of Opal
8.7km (5.4 miles) ⓘBom Sucesso No. 4 quarry, Tavares (Chãs; Várzea e Travanca), Mangualde, Viseu, Portugal
13.7km (8.5 miles) ⓘRomãs quarry, U.F Romãs Decermilo e Vila Longa, Sátão, Viseu, Portugal
16.7km (10.4 miles) ⓘGralheira Mine, U.F Romãs Decermilo e Vila Longa, Sátão, Viseu, Portugal
17.0km (10.5 miles) ⓘFonte Limeira quarry, U.F Romãs Decermilo e Vila Longa, Sátão, Viseu, Portugal
22.3km (13.9 miles) ⓘAssunção Mine, Aldeia Nova, Ferreira de Aves, Sátão, Viseu, Portugal
26.9km (16.7 miles) ⓘPenedo da Cabeça quarry, U.F. Sequeiros e Gradiz, Aguiar da Beira, Guarda, Portugal
27.0km (16.8 miles) ⓘRatoeira quarry, U.F. Sequeiros e Gradiz, Aguiar da Beira, Guarda, Portugal
47.9km (29.8 miles) ⓘBendada Mines, Bendada, Sabugal, Guarda, Portugal
64.0km (39.8 miles) ⓘPalhal Mine, Branca, Albergaria-a-Velha, Aveiro, Portugal
70.4km (43.8 miles) ⓘPortugal 1 & 2 quarries, Malpartida, Malpartida e Vale de Coelha, Almeida, Guarda, Portugal
References
 
and/or  
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