Vote for your favorite mineral in #MinCup26! - Monazite-(Ce) vs. Andalusite
It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Healdsburg, Sonoma County, California, USAi
Regional Level Types
Healdsburg- not defined -
Sonoma CountyCounty
CaliforniaState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearchMineralogy
06893330017362183527735.jpg
Omphacite, etc.

Healdsburg, Sonoma County, California, USA
00777100017362183549236.jpg
Lawsonite, etc.

Healdsburg, Sonoma County, California, USA
07325060017272051449547.jpg
Lawsonite

Porter Creek, Healdsburg, Sonoma County, California, USA
06893330017362183527735.jpg
Omphacite, etc.

Healdsburg, Sonoma County, California, USA
00777100017362183549236.jpg
Lawsonite, etc.

Healdsburg, Sonoma County, California, USA
07325060017272051449547.jpg
Lawsonite

Porter Creek, Healdsburg, Sonoma County, California, USA
06893330017362183527735.jpg
Omphacite, etc.

Healdsburg, Sonoma County, California, USA
00777100017362183549236.jpg
Lawsonite, etc.

Healdsburg, Sonoma County, California, USA
Latitude & Longitude (WGS84):
38° 36' 38'' North , 122° 52' 5'' West
Latitude & Longitude (decimal):
38.61056,-122.86806
GRN:
N26W70
Köppen climate type:
Csb : Warm-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Healdsburg11,742 (2017)0.1km
Windsor27,464 (2017)8.4km
Geyserville862 (2011)11.2km
Larkfield-Wikiup8,884 (2011)14.8km
Fulton541 (2011)15.3km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Santa Rosa Mineral And Gem Society, Inc.Santa Rosa, California23km
Mindat Locality ID:
211521
Long-form identifier:
mindat:1:2:211521:7
GUID (UUID V4):
0


No description has been added for this locality. Can you add one?

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

20 valid minerals.

Rock Types Recorded


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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘ Almandine
Formula: Fe2+3Al2(SiO4)3
ⓘ Antigorite
Formula: Mg3(Si2O5)(OH)4
Description: Occurs as a granularite composed of fine-grained masses of platy crystals.
ⓘ 'Apatite'
Formula: Ca5(PO4)3A
Description: Inclusions in garnet.
ⓘ Aragonite
Formula: CaCO3
Description: Inclusions in garnet.
ⓘ Cerussite
Formula: PbCO3
Colour: Yellow
Description: Occurs as a heavy concentrate in sands.
ⓘ 'Chlorite Group'
Description: Replaces garnet.
ⓘ Clinozoisite
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Description: Inclusions in garnet and in matrix titanite.
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Description: Occurs in glaucophane schist.
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
Description: Occurs in an eclogite.
ⓘ Glaucophane
Formula: ◻Na2(Mg3Al2)Si8O22(OH)2
ⓘ Graphite
Formula: C
Description: Occurs as low-grade deposits.
ⓘ Ilmenite
Formula: Fe2+TiO3
ⓘ Lawsonite
Formula: CaAl2(Si2O7)(OH)2 · H2O
Description: Occurs in vein to 1 cm wide with good quality crystals in cavities in glaucophane schists.
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Phengite
Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
ⓘ Omphacite
Formula: (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
Description: Occurs in an eclogite.
ⓘ 'Pumpellyite Subgroup'
Formula: Ca2XAl2[Si2O6(OH)][SiO4](OH)2A
Colour: Dull green
Description: Occurs in glaucophane schist.
ⓘ Pyrite
Formula: FeS2
Habit: Octahedral
Colour: Brassy
Description: Occurs as large octahedra.
ⓘ 'Pyroaurite-2H'
Formula: Mg6Fe3+2(OH)16(CO3) · 4H2O
Colour: Dark green
Description: Occurs as crystalline coatings on serpentine.
ⓘ Quartz
Formula: SiO2
Description: Inclusions in garnet.
ⓘ Riebeckite
Formula: ◻Na2(Fe2+3Fe3+2)Si8O22(OH)2
ⓘ Rutile
Formula: TiO2
Description: Inclusions in matrix titanite.
ⓘ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
ⓘ Talc
Formula: Mg3Si4O10(OH)2
Colour: White
Description: Occurs as nearly pure masses to 2 feet (0.6 meters) diameter in glaucophane schists.
ⓘ Titanite
Formula: CaTiO(SiO4)
Description: Occurs as crystals to 1 cm, often concentrated along crevices in eclogite.
ⓘ Zircon
Formula: Zr(SiO4)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘGraphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘQuartz4.DA.05SiO2
ⓘRutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
ⓘAragonite5.AB.15CaCO3
ⓘCerussite5.AB.15PbCO3
ⓘ'Pyroaurite-2H'5.DA.45Mg6Fe3+2(OH)16(CO3) · 4H2O
Group 9 - Silicates
ⓘAlmandine9.AD.25Fe2+3Al2(SiO4)3
ⓘZircon9.AD.30Zr(SiO4)
ⓘTitanite9.AG.15CaTiO(SiO4)
ⓘLawsonite9.BE.05CaAl2(Si2O7)(OH)2 · H2O
ⓘClinozoisite9.BG.05a(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘOmphacite9.DA.20(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
ⓘActinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘGlaucophane9.DE.25◻Na2(Mg3Al2)Si8O22(OH)2
ⓘRiebeckite9.DE.25◻Na2(Fe2+3Fe3+2)Si8O22(OH)2
ⓘTalc9.EC.05Mg3Si4O10(OH)2
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Phengite9.EC.15KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
ⓘAntigorite9.ED.15Mg3(Si2O5)(OH)4
Unclassified
ⓘ'Chlorite Group'-
ⓘ'Pumpellyite Subgroup'-Ca2XAl2[Si2O6(OH)][SiO4](OH)2A
ⓘ'Garnet Group'-X3Z2(SiO4)3
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4
ⓘ'Apatite'-Ca5(PO4)3A

List of minerals for each chemical element

HHydrogen
Hⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hⓘ AntigoriteMg3(Si2O5)(OH)4
Hⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ Glaucophane◻Na2(Mg3Al2)Si8O22(OH)2
Hⓘ LawsoniteCaAl2(Si2O7)(OH)2 · H2O
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Hⓘ Pumpellyite SubgroupCa2XAl2[Si2O6(OH)][SiO4](OH)2A
Hⓘ Riebeckite◻Na2(Fe32+Fe23+)Si8O22(OH)2
Hⓘ Pyroaurite-2HMg6Fe23+(OH)16(CO3) · 4H2O
Hⓘ TalcMg3Si4O10(OH)2
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
CCarbon
Cⓘ AragoniteCaCO3
Cⓘ CerussitePbCO3
Cⓘ GraphiteC
Cⓘ Pyroaurite-2HMg6Fe23+(OH)16(CO3) · 4H2O
OOxygen
Oⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oⓘ AntigoriteMg3(Si2O5)(OH)4
Oⓘ AragoniteCaCO3
Oⓘ AlmandineFe32+Al2(SiO4)3
Oⓘ CerussitePbCO3
Oⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ Glaucophane◻Na2(Mg3Al2)Si8O22(OH)2
Oⓘ IlmeniteFe2+TiO3
Oⓘ LawsoniteCaAl2(Si2O7)(OH)2 · H2O
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Oⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Oⓘ Pumpellyite SubgroupCa2XAl2[Si2O6(OH)][SiO4](OH)2A
Oⓘ QuartzSiO2
Oⓘ Riebeckite◻Na2(Fe32+Fe23+)Si8O22(OH)2
Oⓘ RutileTiO2
Oⓘ Pyroaurite-2HMg6Fe23+(OH)16(CO3) · 4H2O
Oⓘ TalcMg3Si4O10(OH)2
Oⓘ TitaniteCaTiO(SiO4)
Oⓘ ZirconZr(SiO4)
Oⓘ Garnet GroupX3Z2(SiO4)3
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
Oⓘ ApatiteCa5(PO4)3A
NaSodium
Naⓘ Glaucophane◻Na2(Mg3Al2)Si8O22(OH)2
Naⓘ Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Naⓘ Riebeckite◻Na2(Fe32+Fe23+)Si8O22(OH)2
MgMagnesium
Mgⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgⓘ AntigoriteMg3(Si2O5)(OH)4
Mgⓘ Glaucophane◻Na2(Mg3Al2)Si8O22(OH)2
Mgⓘ Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Mgⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Mgⓘ Pyroaurite-2HMg6Fe23+(OH)16(CO3) · 4H2O
Mgⓘ TalcMg3Si4O10(OH)2
AlAluminium
Alⓘ AlmandineFe32+Al2(SiO4)3
Alⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ Glaucophane◻Na2(Mg3Al2)Si8O22(OH)2
Alⓘ LawsoniteCaAl2(Si2O7)(OH)2 · H2O
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Alⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Alⓘ Pumpellyite SubgroupCa2XAl2[Si2O6(OH)][SiO4](OH)2A
SiSilicon
Siⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siⓘ AntigoriteMg3(Si2O5)(OH)4
Siⓘ AlmandineFe32+Al2(SiO4)3
Siⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ Glaucophane◻Na2(Mg3Al2)Si8O22(OH)2
Siⓘ LawsoniteCaAl2(Si2O7)(OH)2 · H2O
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Siⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Siⓘ Pumpellyite SubgroupCa2XAl2[Si2O6(OH)][SiO4](OH)2A
Siⓘ QuartzSiO2
Siⓘ Riebeckite◻Na2(Fe32+Fe23+)Si8O22(OH)2
Siⓘ TalcMg3Si4O10(OH)2
Siⓘ TitaniteCaTiO(SiO4)
Siⓘ ZirconZr(SiO4)
Siⓘ Garnet GroupX3Z2(SiO4)3
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
PPhosphorus
Pⓘ ApatiteCa5(PO4)3A
SSulfur
Sⓘ PyriteFeS2
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
CaCalcium
Caⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caⓘ AragoniteCaCO3
Caⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ LawsoniteCaAl2(Si2O7)(OH)2 · H2O
Caⓘ Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Caⓘ Pumpellyite SubgroupCa2XAl2[Si2O6(OH)][SiO4](OH)2A
Caⓘ TitaniteCaTiO(SiO4)
Caⓘ ApatiteCa5(PO4)3A
TiTitanium
Tiⓘ IlmeniteFe2+TiO3
Tiⓘ RutileTiO2
Tiⓘ TitaniteCaTiO(SiO4)
FeIron
Feⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feⓘ AlmandineFe32+Al2(SiO4)3
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ IlmeniteFe2+TiO3
Feⓘ Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Feⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Feⓘ PyriteFeS2
Feⓘ Riebeckite◻Na2(Fe32+Fe23+)Si8O22(OH)2
Feⓘ Pyroaurite-2HMg6Fe23+(OH)16(CO3) · 4H2O
ZrZirconium
Zrⓘ ZirconZr(SiO4)
PbLead
Pbⓘ CerussitePbCO3

Localities in this Region

USA
USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Aubury, Lewis E. (1906), The structural and industrial materials of California: California Mining Bureau. Bulletin 38: 281
Bradley, W.W. (1938), Thirty-fourth report of the State Mineralogist: California Division Mines Report 34: 608
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 126, 207.
Quick NavTopCommoditiesMineral ListRock TypesLocalities in RegionOther RegionsReferences
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 7, 2026 09:30:37 Page updated: July 24, 2026 04:46:32
Go to top of page