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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Biotite from
Mont Saint-Gregoire (Mont Johnson; Monoir), Le Haut-Richelieu RCM, Montérégie, Québec, Canada


Locality type:Mountain
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Mont Saint-Gregoire (Mont Johnson; Monoir), Le Haut-Richelieu RCM, Montérégie, Québec, Canada
Data Identifiers
Mindat Occurrence Record ID:832111
Long-form Identifier:1:3:832111:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
15.9km (9.9 miles) ⓘMont Rougemont, Rouville RCM, Montérégie, Québec, Canada
22.7km (14.1 miles) ⓘPoudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
24.4km (15.1 miles) ⓘMont Yamaska, Rouville RCM, Montérégie, Québec, Canada
39.7km (24.7 miles) ⓘCorporation (Forsyth's) quarry, Mont Royal, Montréal, Québec, Canada
39.8km (24.8 miles) ⓘRosemont quarry, Montréal, Québec, Canada
40.4km (25.1 miles) ⓘMont Brome, Bromont, Estrie, Québec, Canada
41.4km (25.7 miles) ⓘCanadian National Railway tunnel, Mont Royal, Montréal, Québec, Canada
41.7km (25.9 miles) ⓘMont Shefford, Shefford, La Haute-Yamaska RCM, Estrie, Québec, Canada
41.8km (26.0 miles) ⓘLafarge Montreal East quarry (Carrière Lafarge Montréal-Est; Francon Montréal-Est quarry; Canada Cement quarry), Montréal-Est, Montréal, Québec, Canada
42.5km (26.4 miles) ⓘFrancon quarry, Montréal, Québec, Canada
References
Woolley, Alan R. (1987) Alkaline Rocks and Carbonatites of the World. Part 1: North and South America - Alkaline Rocks and Carbonatites of the World. British Museum (Natural History). 216 pp.
 
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