Log InRegister
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 Articles
Minerals by PropertiesMinerals by ChemistryAdvanced 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 CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Amethyst Prospect, Hardscrabble District, Custer Co., Colorado, USAi
Regional Level Types
Amethyst ProspectProspect
Hardscrabble DistrictMining District
Custer Co.County
ColoradoState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
Key
Lock Map
Latitude & Longitude (WGS84): 37° 58' North , 105° 6' West
Latitude & Longitude (decimal): 37.96667,-105.10000
GeoHash:G#: 9wtrbrseb
Locality type:Prospect
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Rye156 (2017)15.6km
Beulah Valley556 (2011)16.6km
Colorado City2,193 (2011)23.3km
Silver Cliff591 (2017)35.6km
Westcliffe577 (2017)37.1km


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

Regions containing this locality

North America PlateTectonic Plate
Rocky Mountains, North AmericaMountain Range

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


12 valid minerals.

Detailed Mineral List:

Anthophyllite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Reference: Minerals of Colorado (1997) Eckel, E. B.
'Biotite'
Reference: Minerals of Colorado (1997) Eckel, E. B.; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Brucite
Formula: Mg(OH)2
Reference: Minerals of Colorado (1997) E.B. Eckel
Chalcopyrite
Formula: CuFeS2
Reference: The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Reference: Minerals of Colorado (1997) Eckel, E. B.; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Corundum
Formula: Al2O3
Reference: Minerals of Colorado (1997) Eckel, E. B.; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Gahnite
Formula: ZnAl2O4
Reference: Minerals of Colorado (1997) Eckel, E. B.; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Galena
Formula: PbS
Reference: The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Pyrite
Formula: FeS2
Reference: The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Pyrrhotite
Formula: Fe7S8
Reference: The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Sapphirine
Formula: Mg4(Mg3Al9)O4[Si3Al9O36]
Reference: Minerals of Colorado (1997) Eckel, E. B.; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Sphalerite
Formula: ZnS
Reference: The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Spinel
Formula: MgAl2O4
Reference: Minerals of Colorado (1997) E.B. Eckel; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Brucite4.FE.05Mg(OH)2
Corundum4.CB.05Al2O3
Gahnite4.BB.05ZnAl2O4
Spinel4.BB.05MgAl2O4
Group 9 - Silicates
Anthophyllite9.DD.05☐{Mg2}{Mg5}(Si8O22)(OH)2
Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
Sapphirine9.DH.45Mg4(Mg3Al9)O4[Si3Al9O36]
Unclassified Minerals, Rocks, etc.
'Biotite'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Corundum4.3.1.1Al2O3
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
X(OH)2
Brucite6.2.1.1Mg(OH)2
Group 7 - MULTIPLE OXIDES
AB2X4
Gahnite7.2.1.4ZnAl2O4
Spinel7.2.1.1MgAl2O4
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with Al substituted rings
Cordierite61.2.1.1(Mg,Fe)2Al3(AlSi5O18)
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Anthophyllite66.1.2.1☐{Mg2}{Mg5}(Si8O22)(OH)2
Group 69 - INOSILICATES Chains with Side Branches or Loops
Chains with Side Branches or Loops with P>2
Sapphirine69.2.1b.1Mg4(Mg3Al9)O4[Si3Al9O36]
Unclassified Minerals, Mixtures, etc.
'Biotite'-

List of minerals for each chemical element

HHydrogen
H Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
H BruciteMg(OH)2
OOxygen
O Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
O SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
O CorundumAl2O3
O GahniteZnAl2O4
O BruciteMg(OH)2
O SpinelMgAl2O4
MgMagnesium
Mg Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Mg SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mg BruciteMg(OH)2
Mg SpinelMgAl2O4
AlAluminium
Al SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
Al CorundumAl2O3
Al GahniteZnAl2O4
Al SpinelMgAl2O4
SiSilicon
Si Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Si SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
SSulfur
S SphaleriteZnS
S GalenaPbS
S ChalcopyriteCuFeS2
S PyrrhotiteFe7S8
S PyriteFeS2
FeIron
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)
Fe ChalcopyriteCuFeS2
Fe PyrrhotiteFe7S8
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn GahniteZnAl2O4
Zn SphaleriteZnS
PbLead
Pb GalenaPbS

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Mesoproterozoic
1000 - 1600 Ma



ID: 2855957
Granitic rocks of 1400-m.y. age group

Age: Mesoproterozoic (1000 - 1600 Ma)

Stratigraphic Name: Silver Plume Granite; Sherman Granite; Cripple Creek Granite; St. Kevin Granite; Vernal Mesa Granite; Curecanti Granite; Eolus Granite; Trimble Granite

Description: Includes Silver Plume, Sherman, Cripple Creek, St. Kevin, Vernal Mesa, Curecanti, Eolus, and Trimble Granites or Quartz Monzonites; also, San Isabel Granite of Boyer (1962) and unnamed granitic rocks

Comments: Original map source: Green, G.N., 1992, The Digital Geologic Map of Colorado in ARC/INFO Format: U.S. Geological Survey Open-File Report 92-0507, 9 p., scale 1:500,000.

Lithology: Major:{alkali feldspar granite,granite}, Minor:{quartz monzonite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Paleoproterozoic
1600 - 2500 Ma



ID: 3186950
Paleoproterozoic crystalline metamorphic rocks

Age: Proterozoic (1600 - 2500 Ma)

Lithology: Orthogneiss/paragneiss

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


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.
 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: July 17, 2019 10:11:54 Page generated: March 30, 2019 09:17:35
Go to top of page