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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Bertrandite from
Twin Cedars pegmatite, South Platte Pegmatite Mining District, Jefferson County, Colorado, USA


Locality type:Pegmatite
Classification
Species:Bertrandite
Formula:Be4(Si2O7)(OH)2
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Bertrandite data
Locality Data:Click here to view Twin Cedars pegmatite, South Platte Pegmatite Mining District, Jefferson County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:298315
Long-form Identifier:1:3:298315:8
GUID (UUID V4):0
Nearest other occurrences of Bertrandite
20.4km (12.7 miles) ⓘBigger Mica Mine (Sweitzer Lode), Clear Creek pegmatite Province, Jefferson County, Colorado, USA
28.9km (18.0 miles) ⓘHarris Park, Park County, Colorado, USA
34.9km (21.7 miles) ⓘChina Wall Area, Lake George Beryllium area (Badger Flats Beryllium area; Mountain Dale), Park County, Colorado, USA
35.6km (22.1 miles) ⓘBlack Prince Mine, Lake George Beryllium area (Badger Flats Beryllium area; Mountain Dale), Park County, Colorado, USA
35.6km (22.1 miles) ⓘA & C Claims (A & C No. 2 Claim; China Wall Cupola), Lake George Beryllium area (Badger Flats Beryllium area; Mountain Dale), Park County, Colorado, USA
35.9km (22.3 miles) ⓘHazel Marie Group, Lake George Beryllium area (Badger Flats Beryllium area; Mountain Dale), Park County, Colorado, USA
36.1km (22.4 miles) ⓘRedskin Mine (Redskin Claim; Claims: Papoose; Squaw), Lake George Beryllium area (Badger Flats Beryllium area; Mountain Dale), Park County, Colorado, USA
36.6km (22.7 miles) ⓘRedskin Gulch, Lake George Beryllium area (Badger Flats Beryllium area; Mountain Dale), Park County, Colorado, USA
38.8km (24.1 miles) ⓘMary Lea-Little Bear Mine (Mary Lee Mine; Little Bear No. 2 Mine), Lake George, Park County, Colorado, USA
38.8km (24.1 miles) ⓘTennessee Mine (Tennessee No. 2), Lake George Beryllium area (Badger Flats Beryllium area; Mountain Dale), Park County, Colorado, USA
References
Simmons, William B., Heinrich, E. William (1980) Rare-Earth Pegmatites of the South Platte District, Colorado. Resource Series 11, Colorado Geological Survey.
 
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