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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Serpentine Subgroup from
Stephens Mine, Skagit County, Washington, USA


Locality type:Mine
Classification
Species:'Serpentine Subgroup' (not an IMA approved species)
Formula:D3[Si2O5](OH)4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Serpentine Subgroup data
Locality Data:Click here to view Stephens Mine, Skagit County, Washington, USA
Data Identifiers
Mindat Occurrence Record ID:145140
Long-form Identifier:1:3:145140:5
GUID (UUID V4):0
Nearest other occurrences of Serpentine Subgroup
4.3km (2.7 miles) ⓘCultus Mountain Nickel Occurrence, Hamilton Mining District, Skagit County, Washington, USA
7.9km (4.9 miles) ⓘWalker Valley, Skagit County, Washington, USA
11.4km (7.1 miles) ⓘMount Vernon Mine, Skagit County, Washington, USA
24.3km (15.1 miles) ⓘAlverson Mine, Fidalgo Island, Skagit County, Washington, USA
26.5km (16.5 miles) ⓘFinney Creek, Skagit County, Washington, USA
27.8km (17.3 miles) ⓘBellingham Prospect, Skagit County, Washington, USA
29.2km (18.1 miles) ⓘTwins Group, Skagit County, Washington, USA
29.5km (18.3 miles) ⓘSumner Claim, Sisters Mining District, Whatcom County, Washington, USA
29.9km (18.6 miles) ⓘMcMaster Prospect, Three Lakes, Skagit County, Washington, USA
31.8km (19.8 miles) ⓘDanny Mine, Sisters Mining District, Whatcom County, Washington, USA
References
Rocks & Min.: 14:112-113.
 
and/or  
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