Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Prehnite from
48-55 Mine, Vesper Peak, Sultan Mining District, Snohomish County, Washington, USA


Locality type:Prospect
Classification
Species:Prehnite
Formula:Ca2Al2Si3O10(OH)2
Habit:slightly corroded crystals to 1.5" long
Colour:light green
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Prehnite data
Locality Data:Click here to view 48-55 Mine, Vesper Peak, Sultan Mining District, Snohomish County, Washington, USA
Data Identifiers
Mindat Occurrence Record ID:93802
Long-form Identifier:1:3:93802:2
GUID (UUID V4):0
Nearest other occurrences of Prehnite
22.4km (13.9 miles) ⓘIron Peak Roadcuts, Trout Creek, Index Mining District, Snohomish County, Washington, USA
25.5km (15.8 miles) ⓘStevens Pass Motel area, Index Mining District, Snohomish County, Washington, USA
59.0km (36.7 miles) ⓘCondor-Hemlock Mine, Middle Fork of the Snoqualmie River, Snoqualmie Mining District, King County, Washington, USA
59.6km (37.0 miles) ⓘMount Roosevelt, Middle Fork of the Snoqualmie River, Snoqualmie Mining District, King County, Washington, USA
84.3km (52.4 miles) ⓘRibbon Mine, Sisters Mining District, Whatcom County, Washington, USA
85.3km (53.0 miles) ⓘWashington Pass, Golden Horn Batholith, Okanogan County, Washington, USA
References
Valentine, Grant M., Huntting, Marshall T. (1960) Part II - Metallic Minerals, in Inventory of Washington Minerals. Vol II. Bulletin 37, Washington Geological Survey.p.83
Cannon, Bart (1975) Minerals of Washington. Cordilleran. 184 pp.pages 52, 54, 99, 105, 108, 137, 152
Cannon, Bart (1991) The Vesper Peak Garnet Deposit. Rocks & Minerals, 66 (6) 478-484 doi:10.1080/00357529.1991.11761657
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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