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
Dillon Nickel Deposit (Wolf Creek Nickel Deposit), Ruby Mining District, Beaverhead County, Montana, USA


Locality type:Deposit
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 Dillon Nickel Deposit (Wolf Creek Nickel Deposit), Ruby Mining District, Beaverhead County, Montana, USA
Data Identifiers
Mindat Occurrence Record ID:1882050
Long-form Identifier:1:3:1882050:6
GUID (UUID V4):0
Nearest other occurrences of Biotite
9.2km (5.7 miles) ⓘCamp Creek Corundum Occurrence, Beaverhead County, Montana, USA
45.7km (28.4 miles) ⓘSkunk Creek outcrops, Madison County, Montana, USA
69.5km (43.2 miles) ⓘCrystal Park Occurrence (Hot Springs Creek; Price Creek), Pioneer Mining District, Beaverhead County, Montana, USA
69.8km (43.4 miles) ⓘJacobson Meadows Occurrence, Pioneer Mining District, Beaverhead County, Montana, USA
78.1km (48.6 miles) ⓘKay Claims, Leadore, Leadore Mining District, Lemhi County, Idaho, USA
79.8km (49.6 miles) ⓘGilliam prospect, Madison County, Montana, USA
83.4km (51.8 miles) ⓘBeartrap corundum deposit, Madison County, Montana, USA
83.6km (51.9 miles) ⓘNo. 31 Thorium Deposit, Lemhi Pass Mining District, Lemhi County, Idaho, USA
84.7km (52.6 miles) ⓘWonder Mine (Wonder Lodes Nos. 1 to 5 and Buckhorn Claims), McDevitt Mining District, Lemhi County, Idaho, USA
84.8km (52.7 miles) ⓘLast Chance vein, Nuclear Fuels and Rare Metals Corporation Prospect (Lake Vein; Contact Vein; Deer Vein; Silver Queen 52-B; Silver Queen 38-A; Wonder Lode; Cago Vein; Black Bull; Wonder Vein), Lemhi Pass Mining District, Lemhi County, Idaho, USA
References
Sinkler, Helen (1942) Geology and ore deposits of the Dillon nickel prospect, southwestern Montana. Economic Geology, 37 (2) 136-152 doi:10.2113/gsecongeo.37.2.136
 
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