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

Saint David area, Cochise Co., Arizona, USAi
Regional Level Types
Saint David areaArea
Cochise Co.County
ArizonaState
USACountry

This page kindly sponsored by Rolf Luetcke
Key
Lock Map
Latitude & Longitude (WGS84):
31° 54' 15'' North , 110° 12' 49'' West
Latitude & Longitude (decimal):
Locality type:


The St. David area is an alluvial outflow from the Whetstone Mountains to the West. At the San Pedro River in the center of the valley the alluvial deposits are up to fifteen hundred feet in depth.
Subsequent erosion cut through layers of soil, exposing the various deposition levels.
Soil saturation of rainwater and subsequent evaporation allowed deposition of gypsum in many forms. Opal also formed in the same way above impervious layers of caliche or clays.
Quartz, magnetite, garnet, iron and other minerals are found in the outflow washes. Some of the opal and silica pods are slightly radioactive from the marginally commercial deposits in the Whetstone Mountains.

Regions containing this locality

North America PlateTectonic Plate
Sonoran Desert, North AmericaDesert
San Pedro river valley, Arizona/Sonora, USA/MexicoValley

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


12 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and 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:

Calcite
Formula: CaCO3
Reference: Rolf Luetcke
'Desert Rose'
Reference: Mitchell, 2001. Gem Trails of Arizona
Fluorite
Formula: CaF2
Reference: Rolf Luetcke
Grossular
Formula: Ca3Al2(SiO4)3
Reference: Rolf Luetcke
Gypsum
Formula: CaSO4 · 2H2O
Reference: Mitchell, 2001. Gem Trails of Arizona
Gypsum var: Selenite
Formula: CaSO4 · 2H2O
Reference: Mitchell, 2001. Gem Trails of Arizona
Hematite
Formula: Fe2O3
Reference: Rolf Luetcke
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Rolf Luetcke
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: rolf luetcke
Nitratine
Formula: NaNO3
Reference: Rolf Luetcke
Opal
Formula: SiO2 · nH2O
Reference: Rolf Luetcke
Orthoclase
Formula: K(AlSi3O8)
Reference: Rolf Luetcke
Quartz
Formula: SiO2
Reference: Rolf Luetcke
Quartz var: Chalcedony
Formula: SiO2
Reference: Rolf Luetcke
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Reference: Rolf Luetcke
Whewellite
Formula: Ca(C2O4) · H2O
Reference: Rolf Luetcke

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Opal4.DA.10SiO2 · nH2O
Quartz4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Nitratine5.NA.05NaNO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Gypsum7.CD.40CaSO4 · 2H2O
var: Selenite7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
Grossular9.AD.25Ca3Al2(SiO4)3
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Orthoclase9.FA.30K(AlSi3O8)
Group 10 - Organic Compounds
Whewellite10.AB.45Ca(C2O4) · H2O
Unclassified Minerals, Rocks, etc.
'Desert Rose'-
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 18 - NORMAL NITRATES
AXO3·xH2O, where x can equal zero
Nitratine18.1.1.1NaNO3
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 50 - ORGANIC COMPOUNDS
Oxalates
Whewellite50.1.1.1Ca(C2O4) · H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Grossular51.4.3b.2Ca3Al2(SiO4)3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Orthoclase76.1.1.1K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
'Desert Rose'-
Gypsum
var: Selenite
-CaSO4 · 2H2O
Quartz
var: Chalcedony
-SiO2
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H GypsumCaSO4 · 2H2O
H Gypsum (var: Selenite)CaSO4 · 2H2O
H WhewelliteCa(C2O4) · H2O
H OpalSiO2 · nH2O
H MuscoviteKAl2(AlSi3O10)(OH)2
BBoron
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
CCarbon
C WhewelliteCa(C2O4) · H2O
C CalciteCaCO3
NNitrogen
N NitratineNaNO3
OOxygen
O GypsumCaSO4 · 2H2O
O Gypsum (var: Selenite)CaSO4 · 2H2O
O WhewelliteCa(C2O4) · H2O
O OpalSiO2 · nH2O
O CalciteCaCO3
O QuartzSiO2
O HematiteFe2O3
O GrossularCa3Al2(SiO4)3
O NitratineNaNO3
O OrthoclaseK(AlSi3O8)
O MuscoviteKAl2(AlSi3O10)(OH)2
O Quartz (var: Chalcedony)SiO2
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
O MagnetiteFe2+Fe23+O4
FFluorine
F FluoriteCaF2
NaSodium
Na NitratineNaNO3
AlAluminium
Al GrossularCa3Al2(SiO4)3
Al OrthoclaseK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si OpalSiO2 · nH2O
Si QuartzSiO2
Si GrossularCa3Al2(SiO4)3
Si OrthoclaseK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Quartz (var: Chalcedony)SiO2
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
SSulfur
S GypsumCaSO4 · 2H2O
S Gypsum (var: Selenite)CaSO4 · 2H2O
KPotassium
K OrthoclaseK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca GypsumCaSO4 · 2H2O
Ca Gypsum (var: Selenite)CaSO4 · 2H2O
Ca WhewelliteCa(C2O4) · H2O
Ca CalciteCaCO3
Ca GrossularCa3Al2(SiO4)3
Ca FluoriteCaF2
FeIron
Fe HematiteFe2O3
Fe MagnetiteFe2+Fe23+O4

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Mitchell (2001), Gem Trails of Arizona.

Mindat Articles

Fluorescent Common Opal of St. David, Arizona by Rolf Luetcke
Pseudomorph Crystal Discovery by Rolf Luetcke
Saint David Gypsum Collecting by Rolf Luetcke



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: May 27, 2019 00:11:57
Go to top of page