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Ruby Mountain, Nathrop, Chaffee Co., Colorado, USAi
Regional Level Types
Ruby MountainMountain
Nathrop- not defined -
Chaffee Co.County
ColoradoState
USACountry

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Key
Latitude & Longitude (WGS84):
38° 45' 0'' North , 106° 4' 1'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Johnson Village246 (2011)7.6km
Buena Vista2,760 (2017)11.6km
Smeltertown120 (2011)23.0km
Salida5,467 (2017)24.7km
Maysville135 (2011)25.8km


Ruby Mountain is a topaz rhyolite emplacement located about one mile northeast of Nathrop Colorado. The site containing the most minerals is the west slope. There are public and private portions of the mountain and it is reported the private side was accessible to collectors for a small fee, however, the site has been sold and the new owner now prohits collecting. The public side is part of the Bureau of Land Management (BLM) Brown’s Canyon Wilderness Study Area, and has been proposed to an upgrade of National Monument. Therefore, there are rules (explained on an information board at the trail head). However, rockhounding with hand tools is allowed.

Some garnet crystals can still be found on the slopes in the publicly accessible areas and perhaps with some work an area containing topaz and other minerals can be found.

Probably named in error for the garnet found here.

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


13 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: USGS Bull 1716C
Cristobalite
Formula: SiO2
Reference: ("Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997)
Gold
Formula: Au
Description: More than unverified occurrence. Certainly a mistake. No specimens known. But see: Seaman
Reference: ("Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997); USGS Bull 1716C; Seaman, D. E., 1979, Gold in rhyolite at Nathrop, Colorado: Rocks and Minerals, v. 54, no. 3, p. 108-109.
Hematite
Formula: Fe2O3
Reference: ("Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997); USGS Bull 1716C
Ilmenite
Formula: Fe2+TiO3
Reference: ("Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997)
'K Feldspar'
Reference: Minerals of Colorado (1997) E.B. Eckels
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: Minerals of Colorado (1997) E.B. Eckel
Magnetite
Formula: Fe2+Fe3+2O4
Reference: ("Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997); USGS Bull 1716C
Opal
Formula: SiO2 · nH2O
Reference: USGS Bull 1716C
Pseudobrookite
Formula: Fe2TiO5
Reference: ("Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997); USGS Bull 1716C
Quartz
Formula: SiO2
Habit: Basal pinacoid
Reference: ("Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997); USGS Bull 1716C
Sanidine
Formula: K(AlSi3O8)
Reference: ("Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997); USGS Bull 1716C
Spessartine
Formula: Mn2+3Al2(SiO4)3
Reference: "Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997; USGS Bull 1716C
Topaz
Formula: Al2(SiO4)(F,OH)2
Reference: "Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997; USGS Bull 1716C
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Habit: To 1 inch in diameter
Colour: Black
Description: From pegmatites in area
Reference: USGS Bull 1716C
Tridymite
Formula: SiO2
Reference: ("Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997); USGS Bull 1716C

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 4 - Oxides and Hydroxides
Cristobalite4.DA.15SiO2
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Magnetite4.BB.05Fe2+Fe3+2O4
Opal4.DA.10SiO2 · nH2O
Pseudobrookite4.CB.15Fe2TiO5
Quartz4.DA.05SiO2
Tridymite4.DA.10SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 9 - Silicates
Sanidine9.FA.30K(AlSi3O8)
Spessartine9.AD.25Mn2+3Al2(SiO4)3
Topaz9.AF.35Al2(SiO4)(F,OH)2
Unclassified Minerals, Rocks, etc.
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
AB2X5
Pseudobrookite7.7.1.1Fe2TiO5
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Spessartine51.4.3a.3Mn2+3Al2(SiO4)3
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Topaz52.3.1.1Al2(SiO4)(F,OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Cristobalite75.1.1.1SiO2
Quartz75.1.3.1SiO2
Tridymite75.1.2.1SiO2
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
Sanidine76.1.1.2K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H TopazAl2(SiO4)(F,OH)2
H OpalSiO2 · nH2O
BBoron
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
CCarbon
C CalciteCaCO3
OOxygen
O SpessartineMn32+Al2(SiO4)3
O TopazAl2(SiO4)(F,OH)2
O CristobaliteSiO2
O HematiteFe2O3
O IlmeniteFe2+TiO3
O MagnetiteFe2+Fe23+O4
O PseudobrookiteFe2TiO5
O QuartzSiO2
O SanidineK(AlSi3O8)
O TridymiteSiO2
O K Feldspar (var: Adularia)KAlSi3O8
O OpalSiO2 · nH2O
O CalciteCaCO3
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
FFluorine
F TopazAl2(SiO4)(F,OH)2
AlAluminium
Al SpessartineMn32+Al2(SiO4)3
Al TopazAl2(SiO4)(F,OH)2
Al SanidineK(AlSi3O8)
Al K Feldspar (var: Adularia)KAlSi3O8
SiSilicon
Si SpessartineMn32+Al2(SiO4)3
Si TopazAl2(SiO4)(F,OH)2
Si CristobaliteSiO2
Si QuartzSiO2
Si SanidineK(AlSi3O8)
Si TridymiteSiO2
Si K Feldspar (var: Adularia)KAlSi3O8
Si OpalSiO2 · nH2O
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
KPotassium
K SanidineK(AlSi3O8)
K K Feldspar (var: Adularia)KAlSi3O8
CaCalcium
Ca CalciteCaCO3
TiTitanium
Ti IlmeniteFe2+TiO3
Ti PseudobrookiteFe2TiO5
MnManganese
Mn SpessartineMn32+Al2(SiO4)3
FeIron
Fe HematiteFe2O3
Fe IlmeniteFe2+TiO3
Fe MagnetiteFe2+Fe23+O4
Fe PseudobrookiteFe2TiO5
AuGold
Au GoldAu

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