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
Bom Sucesso No. 4 quarry, Tavares (Chãs; Várzea e Travanca), Mangualde, Viseu, Portugal


00402990017362089049913.jpg
Opal-AN

Bom Sucesso No. 4 quarry, Tavares, Mangualde, Viseu, Portugal
08872490017272088811135.jpg
Opal-AN, etc.

Bom Sucesso No. 4 quarry, Tavares, Mangualde, Viseu, Portugal
09383420017364037838105.jpg
Opal-AN, etc.

Bom Sucesso No. 4 quarry, Tavares, Mangualde, Viseu, Portugal
00638820017272088827895.jpg
Opal-AN, etc.

Bom Sucesso No. 4 quarry, Tavares, Mangualde, Viseu, Portugal
00402990017362089049913.jpg
Opal-AN

Bom Sucesso No. 4 quarry, Tavares, Mangualde, Viseu, Portugal
08872490017272088811135.jpg
Opal-AN, etc.

Bom Sucesso No. 4 quarry, Tavares, Mangualde, Viseu, Portugal
09383420017364037838105.jpg
Opal-AN, etc.

Bom Sucesso No. 4 quarry, Tavares, Mangualde, Viseu, Portugal
01370420017364037845068.jpg
Opal-AN, etc.

Bom Sucesso No. 4 quarry, Tavares, Mangualde, Viseu, Portugal
04396450017364037845993.jpg
Opal-AN

Bom Sucesso No. 4 quarry, Tavares, Mangualde, Viseu, Portugal
08872490017272088811135.jpg
Opal-AN, etc.

Bom Sucesso No. 4 quarry, Tavares, Mangualde, Viseu, Portugal
06107410017364037849873.jpg
Opal-AN, etc.

Bom Sucesso No. 4 quarry, Tavares, Mangualde, Viseu, Portugal
05182400017272088823618.jpg
Opal-AN, etc.

Bom Sucesso No. 4 quarry, Tavares, Mangualde, Viseu, Portugal
Locality type:Quarry
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Bom Sucesso No. 4 quarry, Tavares (Chãs; Várzea e Travanca), Mangualde, Viseu, Portugal
Data Identifiers
Mindat Occurrence Record ID:1010513
Long-form Identifier:1:3:1010513:7
GUID (UUID V4):0
Nearest other occurrences of Opal
8.7km (5.4 miles) ⓘNossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
12.5km (7.8 miles) ⓘRomãs quarry, U.F Romãs Decermilo e Vila Longa, Sátão, Viseu, Portugal
12.8km (8.0 miles) ⓘGralheira Mine, U.F Romãs Decermilo e Vila Longa, Sátão, Viseu, Portugal
15.0km (9.3 miles) ⓘFonte Limeira quarry, U.F Romãs Decermilo e Vila Longa, Sátão, Viseu, Portugal
21.1km (13.1 miles) ⓘAssunção Mine, Aldeia Nova, Ferreira de Aves, Sátão, Viseu, Portugal
24.4km (15.2 miles) ⓘPenedo da Cabeça quarry, U.F. Sequeiros e Gradiz, Aguiar da Beira, Guarda, Portugal
24.5km (15.2 miles) ⓘRatoeira quarry, U.F. Sequeiros e Gradiz, Aguiar da Beira, Guarda, Portugal
41.3km (25.7 miles) ⓘBendada Mines, Bendada, Sabugal, Guarda, Portugal
61.9km (38.5 miles) ⓘPortugal 1 & 2 quarries, Malpartida, Malpartida e Vale de Coelha, Almeida, Guarda, Portugal
72.5km (45.1 miles) ⓘPalhal Mine, Branca, Albergaria-a-Velha, Aveiro, Portugal
References
Nunes, Rui (n.d.) Personal communication.
 
and/or  
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