Vote for your favorite mineral in #MinCup26! - Cuprite vs. Orpiment
It's a fiery match of vibrant red Cuprite and just as saturated orange Orpiment battle for your votes!
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

Coal Creek Serpentinite (Big Branch), Gillespie County, Texas, USAi
Regional Level Types
Coal Creek Serpentinite (Big Branch)- not defined -
Gillespie CountyCounty
TexasState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
30° 28' 43'' North , 98° 37' 52'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Sunrise Beach Village731 (2017)25.1km
Horseshoe Bay3,560 (2017)25.7km
Granite Shoals5,071 (2017)26.7km
Highland Haven452 (2017)26.7km
Kingsland6,030 (2011)27.0km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Fredericksburg RockhoundsFredericksburg, Texas32km
Mindat Locality ID:
42115
Long-form identifier:
mindat:1:2:42115:4
GUID (UUID V4):
0


Northeast part of county from Coal Creek into Blanco County.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


11 valid minerals.

Rock Types Recorded

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Anthophyllite
Formula: ◻{Mg2}{Mg5}(Si8O22)(OH)2
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
'Chlorite Group'
Chromite
Formula: Fe2+Cr3+2O4
Chrysotile
Formula: Mg3(Si2O5)(OH)4
Lizardite
Formula: Mg3(Si2O5)(OH)4
Magnetite
Formula: Fe2+Fe3+2O4
Quartz
Formula: SiO2
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
Talc
Formula: Mg3Si4O10(OH)2
Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2
Vermiculite
Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Zaratite
Formula: Ni3(CO3)(OH)4 · 4H2O ?

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Zaratite5.DA.15Ni3(CO3)(OH)4 · 4H2O ?
Group 9 - Silicates
Chrysotile9.00.Mg3(Si2O5)(OH)4
Anthophyllite9.DD.05◻{Mg2}{Mg5}(Si8O22)(OH)2
Actinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Tremolite9.DE.10◻Ca2Mg5(Si8O22)(OH)2
Talc9.EC.05Mg3Si4O10(OH)2
Vermiculite9.EC.50Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Lizardite9.ED.15Mg3(Si2O5)(OH)4
Unclassified
'Chlorite Group'-
'Serpentine Subgroup'-D3[Si2O5](OH)4
'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
H Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
H Anthophyllite◻{Mg2}{Mg5}(Si8O22)(OH)2
H ChrysotileMg3(Si2O5)(OH)4
H LizarditeMg3(Si2O5)(OH)4
H TalcMg3Si4O10(OH)2
H Tremolite◻Ca2Mg5(Si8O22)(OH)2
H VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
H ZaratiteNi3(CO3)(OH)4 · 4H2O ?
H Serpentine SubgroupD3[Si2O5](OH)4
H ApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
C ZaratiteNi3(CO3)(OH)4 · 4H2O ?
OOxygen
O Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
O Anthophyllite◻{Mg2}{Mg5}(Si8O22)(OH)2
O ChrysotileMg3(Si2O5)(OH)4
O ChromiteFe2+Cr23+O4
O LizarditeMg3(Si2O5)(OH)4
O MagnetiteFe2+Fe23+O4
O QuartzSiO2
O TalcMg3Si4O10(OH)2
O Tremolite◻Ca2Mg5(Si8O22)(OH)2
O VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
O ZaratiteNi3(CO3)(OH)4 · 4H2O ?
O Serpentine SubgroupD3[Si2O5](OH)4
O ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
MgMagnesium
Mg Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mg Anthophyllite◻{Mg2}{Mg5}(Si8O22)(OH)2
Mg ChrysotileMg3(Si2O5)(OH)4
Mg LizarditeMg3(Si2O5)(OH)4
Mg TalcMg3Si4O10(OH)2
Mg Tremolite◻Ca2Mg5(Si8O22)(OH)2
Mg VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
AlAluminium
Al VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
SiSilicon
Si Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Si Anthophyllite◻{Mg2}{Mg5}(Si8O22)(OH)2
Si ChrysotileMg3(Si2O5)(OH)4
Si LizarditeMg3(Si2O5)(OH)4
Si QuartzSiO2
Si TalcMg3Si4O10(OH)2
Si Tremolite◻Ca2Mg5(Si8O22)(OH)2
Si VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Si Serpentine SubgroupD3[Si2O5](OH)4
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
CaCalcium
Ca Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Ca Tremolite◻Ca2Mg5(Si8O22)(OH)2
Ca ApatiteCa5(PO4)3(Cl/F/OH)
CrChromium
Cr ChromiteFe2+Cr23+O4
FeIron
Fe Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Fe ChromiteFe2+Cr23+O4
Fe MagnetiteFe2+Fe23+O4
Fe VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
NiNickel
Ni ZaratiteNi3(CO3)(OH)4 · 4H2O ?

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.
 
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 5, 2026 06:52:50 Page updated: August 8, 2025 18:33:33
Go to top of page