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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Sillimanite from
Unnamed Rutile Occurrence (MRDS - 10090176), Clear Creek Pegmatite Province, Jefferson County, Colorado, USA


Locality type:Occurrence
Classification
Species:Sillimanite
Formula:Al2(SiO4)O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sillimanite data
Locality Data:Click here to view Unnamed Rutile Occurrence (MRDS - 10090176), Clear Creek Pegmatite Province, Jefferson County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:377674
Long-form Identifier:1:3:377674:2
GUID (UUID V4):0
Nearest other occurrences of Sillimanite
2.8km (1.8 miles) ⓘCreswell Mine, Bergen Park area, Jefferson County, Colorado, USA
7.6km (4.7 miles) ⓘAjax Mica Mine (Floyd Hill Mica Mine), Clear Creek Pegmatite Province, Clear Creek County, Colorado, USA
12.6km (7.9 miles) ⓘVigilant; Banta Hill; Gold; Bunkhouse Occurrence, Idaho Springs Mining District (Virginia Mining District), Clear Creek County, Colorado, USA
13.1km (8.1 miles) ⓘGuy Hill pegmatite area, Jefferson County, Colorado, USA
13.5km (8.4 miles) ⓘJennie Lind Tunnel No. 1, Idaho Springs, Lawson Mining District, Clear Creek County, Colorado, USA
14.3km (8.9 miles) ⓘLadwig Group (Ladwig No. 2; Ladwig No. 3; Claims: Ladwig No. 1), Ralston Buttes Mining District, Jefferson County, Colorado, USA
15.1km (9.4 miles) ⓘOld Town Shaft, Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
16.5km (10.3 miles) ⓘBonanza, Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
20.0km (12.5 miles) ⓘTurkey Creek, Jefferson County, Colorado, USA
21.7km (13.5 miles) ⓘMurry Mine, Lawson Mining District, Clear Creek County, Colorado, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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