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Umba River (Umba Valley), Korogwe Rural District, Tanga Region, Tanzaniai
Regional Level Types
Umba River (Umba Valley)River
Korogwe Rural DistrictRural District
Tanga RegionRegion
TanzaniaCountry

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Latitude & Longitude (WGS84):
4° 31' 41'' South , 38° 43' 53'' East
Latitude & Longitude (decimal):
-4.52833,38.73139
GRN:
S04E27
Type:
River
Köppen climate type:
Am : Tropical monsoon climate
Mindat Locality ID:
8265
Long-form identifier:
mindat:1:2:8265:8
GUID (UUID V4):
0
Other Languages:

Mineral List

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

20 valid minerals.2 erroneous literature entries.

Rock Types Recorded

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

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

Select Rock List Type

Alphabetical ListTree Diagram

Detailed Mineral List:

ⓘAlmandine
Formula:Fe2+3Al2(SiO4)3
ⓘ'Almandine-Pyrope Series var. Rhodolite'
Formula:Mg3Al2(SiO4)3
ⓘAnorthite
Formula:Ca(Al2Si2O8)
ⓘ'Apatite'
Formula:Ca5(PO4)3(Cl/F/OH)
ⓘBöhmite
Formula:AlO(OH)
ⓘCalcite
Formula:CaCO3
ⓘ'Clinopyroxene Subgroup'
ⓘCorundum
Formula:Al2O3
ⓘCorundum var. Padparadscha
Formula:Al2O3
ⓘCorundum var. Ruby
Formula:Al2O3
ⓘCorundum var. Sapphire
Formula:Al2O3
ⓘCorundum var. Star Corundum
Formula:Al2O3
ⓘDiopside
Formula:CaMgSi2O6
ⓘElbaite
Formula:Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Description: Shows the so called Usambara effect, with hue changing from green to red with increases in path length of light through the material.
ⓘElbaite var. Chromium-bearing Elbaite
Formula:Na(Li1.5Al1.5)(Al,Cr)6(Si6O18)(BO3)3(OH)3(OH)
Description: Shows the so called Usambara effect, with hue changing from green to red with increases in path length of light through the material.
ⓘEnstatite
Formula:Mg2Si2O6
ⓘEnstatite var. Bronzite
Formula:(Mg,Fe2+)2[SiO3]2
ⓘ'Garnet Group'
Formula:X3Z2(SiO4)3
ⓘGraphite
Formula:C
ⓘHematite
Formula:Fe2O3
ⓘKyanite
Formula:Al2(SiO4)O
ⓘ'Limonite'
ⓘMarialite
Formula:Na4Al3Si9O24Cl
ⓘ'Monazite Group'
Formula:REE(PO4)
ⓘOpal
Formula:SiO2 · nH2O
ⓘ'Orthopyroxene Subgroup'
ⓘPyrope
Formula:Mg3Al2(SiO4)3
ⓘ'Pyrope-Spessartine Series var. Umbalite'
Formula:Mg3Al2(SiO4)3 - Mn3Al2(SiO4)3
ⓘPyrrhotite
Formula:Fe1-xS
ⓘRutile
Formula:TiO2
ⓘ'Scapolite'
ⓘSpinel
Formula:MgAl2O4
ⓘ'Tourmaline'
Formula:AD3G6(T6O18)(BO3)3X3Z
ⓘTurquoise
Formula:CuAl6(PO4)4(OH)8 · 4H2O
Description: Veins of turquoise with a waxy lustre, up to one centimetre in thickness, are embedded in the sediments. The colour of the material varies from yellowish-green to bluish-green. Good quality turquoise was not found, except for minor quantities.
ⓘVermiculite
Formula:Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
ⓘZircon
Formula:Zr(SiO4)
ⓘZoisite
Formula:(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘZoisite var. Tanzanite
Formula:(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)

Gallery:

Mg3Al2(SiO4)3ⓘ'Almandine-Pyrope Series var. Rhodolite'
Al2O3ⓘCorundum
Al2O3ⓘCorundum var. Padparadscha
Al2O3ⓘCorundum var. Sapphire
Na(Li1.5Al1.5)(Al,Cr)6(Si6O18)(BO3)3(OH)3(OH)ⓘElbaite var. Chromium-bearing Elbaite
Mg3Al2(SiO4)3ⓘPyrope
Mg3Al2(SiO4)3 - Mn3Al2(SiO4)3ⓘ'Pyrope-Spessartine Series var. Umbalite'

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘGraphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
ⓘPyrrhotite2.CC.10Fe1-xS
Group 4 - Oxides and Hydroxides
ⓘSpinel4.BB.05MgAl2O4
ⓘCorundum4.CB.05Al2O3
ⓘHematite4.CB.05Fe2O3
ⓘCorundum
var. Ruby		4.CB.05Al2O3
ⓘvar. Sapphire4.CB.05Al2O3
ⓘvar. Star Corundum4.CB.05Al2O3
ⓘvar. Padparadscha4.CB.05Al2O3
ⓘOpal4.DA.10SiO2 · nH2O
ⓘRutile4.DB.05TiO2
ⓘBöhmite4.FE.15AlO(OH)
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 8 - Phosphates, Arsenates and Vanadates
ⓘTurquoise8.DD.15CuAl6(PO4)4(OH)8 · 4H2O
Group 9 - Silicates
ⓘAlmandine9.AD.25Fe2+3Al2(SiO4)3
ⓘPyrope9.AD.25Mg3Al2(SiO4)3
ⓘZircon9.AD.30Zr(SiO4)
ⓘKyanite9.AF.15Al2(SiO4)O
ⓘZoisite
var. Tanzanite ?		9.BG.10(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘ ?9.BG.10(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘElbaite9.CK.05Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘvar. Chromium-bearing Elbaite9.CK.05Na(Li1.5Al1.5)(Al,Cr)6(Si6O18)(BO3)3(OH)3(OH)
ⓘEnstatite9.DA.05Mg2Si2O6
ⓘvar. Bronzite9.DA.05(Mg,Fe2+)2[SiO3]2
ⓘDiopside9.DA.15CaMgSi2O6
ⓘVermiculite9.EC.50Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
ⓘAnorthite9.FA.35Ca(Al2Si2O8)
ⓘMarialite9.FB.15Na4Al3Si9O24Cl
Unclassified
ⓘ'Limonite'-
ⓘ'Monazite Group'-REE(PO4)
ⓘ'Tourmaline'-AD3G6(T6O18)(BO3)3X3Z
ⓘ'Almandine-Pyrope Series
var. Rhodolite'		-Mg3Al2(SiO4)3
ⓘ'Clinopyroxene Subgroup'-
ⓘ'Scapolite'-
ⓘ'Garnet Group'-X3Z2(SiO4)3
ⓘ'Orthopyroxene Subgroup'-
ⓘ'Pyrope-Spessartine Series
var. Umbalite'		-Mg3Al2(SiO4)3 - Mn3Al2(SiO4)3
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
HⓘBöhmiteAlO(OH)
HⓘElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
HⓘOpalSiO2 · nH2O
HⓘZoisite var.Tanzanite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
HⓘTurquoiseCuAl6(PO4)4(OH)8 · 4H2O
HⓘVermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
HⓘZoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
HⓘElbaite var.Chromium-bearing ElbaiteNa(Li1.5Al1.5)(Al,Cr)6(Si6O18)(BO3)3(OH)3(OH)
HⓘApatiteCa5(PO4)3(Cl/F/OH)
LiLithium
LiⓘElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
LiⓘElbaite var.Chromium-bearing ElbaiteNa(Li1.5Al1.5)(Al,Cr)6(Si6O18)(BO3)3(OH)3(OH)
BBoron
BⓘElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
BⓘTourmalineAD3G6(T6O18)(BO3)3X3Z
BⓘElbaite var.Chromium-bearing ElbaiteNa(Li1.5Al1.5)(Al,Cr)6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
CⓘCalciteCaCO3
CⓘGraphiteC
OOxygen
OⓘAnorthiteCa(Al2Si2O8)
OⓘAlmandineFe32+Al2(SiO4)3
OⓘBöhmiteAlO(OH)
OⓘCalciteCaCO3
OⓘCorundumAl2O3
OⓘDiopsideCaMgSi2O6
OⓘElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
OⓘEnstatiteMg2Si2O6
OⓘHematiteFe2O3
OⓘKyaniteAl2(SiO4)O
OⓘMarialiteNa4Al3Si9O24Cl
OⓘMonazite GroupREE(PO4)
OⓘOpalSiO2 · nH2O
OⓘPyropeMg3Al2(SiO4)3
OⓘCorundum var.RubyAl2O3
OⓘRutileTiO2
OⓘCorundum var.SapphireAl2O3
OⓘSpinelMgAl2O4
OⓘZoisite var.Tanzanite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
OⓘTourmalineAD3G6(T6O18)(BO3)3X3Z
OⓘTurquoiseCuAl6(PO4)4(OH)8 · 4H2O
OⓘVermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
OⓘZirconZr(SiO4)
OⓘZoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
OⓘEnstatite var.Bronzite(Mg,Fe2+)2[SiO3]2
OⓘAlmandine-Pyrope Series var.RhodoliteMg3Al2(SiO4)3
OⓘGarnet GroupX3Z2(SiO4)3
OⓘElbaite var.Chromium-bearing ElbaiteNa(Li1.5Al1.5)(Al,Cr)6(Si6O18)(BO3)3(OH)3(OH)
OⓘPyrope-Spessartine Series var.UmbaliteMg3Al2(SiO4)3 - Mn3Al2(SiO4)3
OⓘApatiteCa5(PO4)3(Cl/F/OH)
OⓘCorundum var.Star CorundumAl2O3
OⓘCorundum var.PadparadschaAl2O3
FFluorine
FⓘApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
NaⓘElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
NaⓘMarialiteNa4Al3Si9O24Cl
NaⓘElbaite var.Chromium-bearing ElbaiteNa(Li1.5Al1.5)(Al,Cr)6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
MgⓘDiopsideCaMgSi2O6
MgⓘEnstatiteMg2Si2O6
MgⓘPyropeMg3Al2(SiO4)3
MgⓘSpinelMgAl2O4
MgⓘVermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
MgⓘEnstatite var.Bronzite(Mg,Fe2+)2[SiO3]2
MgⓘAlmandine-Pyrope Series var.RhodoliteMg3Al2(SiO4)3
MgⓘPyrope-Spessartine Series var.UmbaliteMg3Al2(SiO4)3 - Mn3Al2(SiO4)3
AlAluminium
AlⓘAnorthiteCa(Al2Si2O8)
AlⓘAlmandineFe32+Al2(SiO4)3
AlⓘBöhmiteAlO(OH)
AlⓘCorundumAl2O3
AlⓘElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
AlⓘKyaniteAl2(SiO4)O
AlⓘMarialiteNa4Al3Si9O24Cl
AlⓘPyropeMg3Al2(SiO4)3
AlⓘCorundum var.RubyAl2O3
AlⓘCorundum var.SapphireAl2O3
AlⓘSpinelMgAl2O4
AlⓘZoisite var.Tanzanite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
AlⓘTurquoiseCuAl6(PO4)4(OH)8 · 4H2O
AlⓘVermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
AlⓘZoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
AlⓘAlmandine-Pyrope Series var.RhodoliteMg3Al2(SiO4)3
AlⓘElbaite var.Chromium-bearing ElbaiteNa(Li1.5Al1.5)(Al,Cr)6(Si6O18)(BO3)3(OH)3(OH)
AlⓘPyrope-Spessartine Series var.UmbaliteMg3Al2(SiO4)3 - Mn3Al2(SiO4)3
AlⓘCorundum var.Star CorundumAl2O3
AlⓘCorundum var.PadparadschaAl2O3
SiSilicon
SiⓘAnorthiteCa(Al2Si2O8)
SiⓘAlmandineFe32+Al2(SiO4)3
SiⓘDiopsideCaMgSi2O6
SiⓘElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
SiⓘEnstatiteMg2Si2O6
SiⓘKyaniteAl2(SiO4)O
SiⓘMarialiteNa4Al3Si9O24Cl
SiⓘOpalSiO2 · nH2O
SiⓘPyropeMg3Al2(SiO4)3
SiⓘZoisite var.Tanzanite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
SiⓘVermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
SiⓘZirconZr(SiO4)
SiⓘZoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
SiⓘEnstatite var.Bronzite(Mg,Fe2+)2[SiO3]2
SiⓘAlmandine-Pyrope Series var.RhodoliteMg3Al2(SiO4)3
SiⓘGarnet GroupX3Z2(SiO4)3
SiⓘElbaite var.Chromium-bearing ElbaiteNa(Li1.5Al1.5)(Al,Cr)6(Si6O18)(BO3)3(OH)3(OH)
SiⓘPyrope-Spessartine Series var.UmbaliteMg3Al2(SiO4)3 - Mn3Al2(SiO4)3
PPhosphorus
PⓘMonazite GroupREE(PO4)
PⓘTurquoiseCuAl6(PO4)4(OH)8 · 4H2O
PⓘApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
SⓘPyrrhotiteFe1-xS
ClChlorine
ClⓘMarialiteNa4Al3Si9O24Cl
ClⓘApatiteCa5(PO4)3(Cl/F/OH)
CaCalcium
CaⓘAnorthiteCa(Al2Si2O8)
CaⓘCalciteCaCO3
CaⓘDiopsideCaMgSi2O6
CaⓘZoisite var.Tanzanite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
CaⓘZoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
CaⓘApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
TiⓘRutileTiO2
CrChromium
CrⓘElbaite var.Chromium-bearing ElbaiteNa(Li1.5Al1.5)(Al,Cr)6(Si6O18)(BO3)3(OH)3(OH)
MnManganese
MnⓘPyrope-Spessartine Series var.UmbaliteMg3Al2(SiO4)3 - Mn3Al2(SiO4)3
FeIron
FeⓘAlmandineFe32+Al2(SiO4)3
FeⓘHematiteFe2O3
FeⓘPyrrhotiteFe1-xS
FeⓘVermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
FeⓘEnstatite var.Bronzite(Mg,Fe2+)2[SiO3]2
CuCopper
CuⓘTurquoiseCuAl6(PO4)4(OH)8 · 4H2O
ZrZirconium
ZrⓘZirconZr(SiO4)

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Umba_River_(Tanzania)
Wikidata ID:Q655916
GeoNames ID:149213

Localities in this Region

  • Tanga Region

Other Regions, Features and Areas containing this locality

AfricaContinent
African Plate
Somali 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, pleaseregister so you can add to our database. This locality information is for reference purposes only. You should never attempt tovisit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holdersfor access and that you are aware of all safety precautions necessary.

References

Zwaan, P.C. (1974) Garnet, corundum and other gem minerals from Umba, Tanzania. Scripta Geol., 20, 1-41. https://www.repository.naturalis.nl/document/148690
Gübelin, E., Wolgensinger, M. (1976) Edelstenen. Uitgeverij Artis, Brussel (in Dutch).
Jobbins, E. A., Saul, J. M., Statham, Patricia M., Young, B. R. (1978) Studies of a Gem Garnet Suite from the Umba River, Tanzania.The Journal of Gemmology, 16 (3) 161-171doi:10.15506/jog.1978.16.3.161
Hänni, Henry A. (1987) On corundums from Umba Valley, Tanzania.The Journal of Gemmology, 20 (5) 278-284doi:10.15506/jog.1987.20.5.278
en.wikipedia.org (n.d.)https://en.wikipedia.org/wiki/Umba_Valley
en.wikipedia.org (n.d.)https://en.wikipedia.org/wiki/Umba_sapphire
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