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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Cypress Island, Skagit County, Washington, USAi
Regional Level Types
Cypress IslandIsland
Skagit CountyCounty
WashingtonState
USACountry

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Type:
Island
Mindat Locality ID:
17384
Long-form identifier:
mindat:1:2:17384:0
GUID (UUID V4):
0


References:
*Cannon, B. (1975): Minerals of Washington, p.49

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

5 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ 'Apophyllite Group'
Formula: AB4[Si8O22]X · 8H2O
Description: constitutes up to 10% of the groundmass of the islands dunites
ⓘ Chromite
Formula: Fe2+Cr3+2O4
Localities: Reported from at least 7 localities in this region.
ⓘ 'Chrysolite'
ⓘ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
ⓘ Clinochlore var. Chromium-bearing Clinochlore
Formula: Mg5(Al,Cr)2Si3O10(OH)8
ⓘ 'Fayalite-Forsterite Series'
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
Description: Chromium Bearing
ⓘ 'Limonite'
ⓘ 'Limonite var. Chromium-bearing Limonite'
Formula: (Fe,Cr)O(OH) · nH2O
ⓘ 'Olivine Group'
Formula: M2SiO4
ⓘ Pectolite
Formula: NaCa2Si3O8(OH)
ⓘ Prehnite
Formula: Ca2Al2Si3O10(OH)2
ⓘ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
Localities: Reported from at least 6 localities in this region.
ⓘ Xonotlite
Formula: Ca6(Si6O17)(OH)2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘChromite4.BB.05Fe2+Cr3+2O4
Group 9 - Silicates
ⓘPectolite9.DG.05NaCa2Si3O8(OH)
ⓘXonotlite9.DG.35Ca6(Si6O17)(OH)2
ⓘPrehnite9.DP.20Ca2Al2Si3O10(OH)2
ⓘClinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
ⓘvar. Chromium-bearing Clinochlore9.EC.55Mg5(Al,Cr)2Si3O10(OH)8
Unclassified
ⓘ'Apophyllite Group'-AB4[Si8O22]X · 8H2O
ⓘ'Limonite'-
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Hornblende Root Name Group'-◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ'Chrysolite'-
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4
ⓘ'Limonite
var. Chromium-bearing Limonite'		-(Fe,Cr)O(OH) · nH2O
ⓘ'Olivine Group'-M2SiO4

List of minerals for each chemical element

HHydrogen
Hⓘ Apophyllite GroupAB4[Si8O22]X · 8H2O
Hⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Hⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Hⓘ PectoliteNaCa2Si3O8(OH)
Hⓘ PrehniteCa2Al2Si3O10(OH)2
Hⓘ XonotliteCa6(Si6O17)(OH)2
Hⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
Hⓘ Limonite var. Chromium-bearing Limonite(Fe,Cr)O(OH) · nH2O
OOxygen
Oⓘ Apophyllite GroupAB4[Si8O22]X · 8H2O
Oⓘ ChromiteFe2+Cr23+O4
Oⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Oⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Oⓘ PectoliteNaCa2Si3O8(OH)
Oⓘ PrehniteCa2Al2Si3O10(OH)2
Oⓘ XonotliteCa6(Si6O17)(OH)2
Oⓘ Fayalite-Forsterite Series
Oⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
Oⓘ Limonite var. Chromium-bearing Limonite(Fe,Cr)O(OH) · nH2O
Oⓘ Olivine GroupM2SiO4
FFluorine
Fⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
NaSodium
Naⓘ PectoliteNaCa2Si3O8(OH)
MgMagnesium
Mgⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Mgⓘ Fayalite-Forsterite Series
AlAluminium
Alⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Alⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Alⓘ PrehniteCa2Al2Si3O10(OH)2
Alⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SiSilicon
Siⓘ Apophyllite GroupAB4[Si8O22]X · 8H2O
Siⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Siⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Siⓘ PectoliteNaCa2Si3O8(OH)
Siⓘ PrehniteCa2Al2Si3O10(OH)2
Siⓘ XonotliteCa6(Si6O17)(OH)2
Siⓘ Fayalite-Forsterite Series
Siⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
Siⓘ Olivine GroupM2SiO4
ClChlorine
Clⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
CaCalcium
Caⓘ PectoliteNaCa2Si3O8(OH)
Caⓘ PrehniteCa2Al2Si3O10(OH)2
Caⓘ XonotliteCa6(Si6O17)(OH)2
Caⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
CrChromium
Crⓘ ChromiteFe2+Cr23+O4
Crⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Crⓘ Limonite var. Chromium-bearing Limonite(Fe,Cr)O(OH) · nH2O
FeIron
Feⓘ ChromiteFe2+Cr23+O4
Feⓘ Fayalite-Forsterite Series
Feⓘ Limonite var. Chromium-bearing Limonite(Fe,Cr)O(OH) · nH2O

Localities in this Region

USA

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate

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