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
Roca Negra, Roquefort-sur-Soulzon, Millau, Aveyron, Occitanie, France


Locality type:Volcanic Dome
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 Roca Negra, Roquefort-sur-Soulzon, Millau, Aveyron, Occitanie, France
Data Identifiers
Mindat Occurrence Record ID:1771309
Long-form Identifier:1:3:1771309:6
GUID (UUID V4):0
Nearest other occurrences of Opal
34.2km (21.3 miles) ⓘValcroze, Alzon, Le Vigan, Gard, Occitanie, France
43.5km (27.0 miles) ⓘRabejac Est, Le Puech, Lodève, Hérault, Occitanie, France
43.7km (27.2 miles) ⓘRivièral, Le Bosc, Lodève, Hérault, Occitanie, France
53.8km (33.5 miles) ⓘPhosphate occurrence, Fumade, Fontrieu, Castres, Tarn, Occitanie, France
63.7km (39.6 miles) ⓘLa Caravantié quarry, Peyrebrune, Montredon-Labessonnié, Castres, Tarn, Occitanie, France
74.8km (46.5 miles) ⓘLe Kaymar, Pruines, Rodez, Aveyron, Occitanie, France
83.8km (52.1 miles) ⓘPuy de Wolf (Puech de Voll), Firmi, Villefranche-de-Rouergue, Aveyron, Occitanie, France
References
Club Minéralogique de Saint-Juery (2025) Prospection à Roquefort-sur-Soulzon (Aveyron) [Prospecting in Roquefort-sur-Soulzon (Aveyron)]. Le Cahier des Micromonteurs 168(2), 12-22
 
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