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Grootberg Pass, Grootberg Mountain, Khorixas, Kunene Region, Namibiai
Regional Level Types
Grootberg PassPass
Grootberg MountainMountain Range
KhorixasConstituency
Kunene RegionRegion
NamibiaCountry

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Key
Latitude & Longitude:
20° South , 14° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~132km
Locality type:


Grootberg is the premier zeolite producing locality in Namibia; and while the zeolites from this deposit do not rival their Indian counterparts in terms of color they can occasion be real monsters in terms of pure size.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


5 valid minerals.

Detailed Mineral List:

Analcime
Formula: Na(AlSi2O6) · H2O
Description: Crystals to 1.5cm are known from a single specimen.
Reference: Von Bezing, L., Bode, R., and Jahn, S., (2008) Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern. 449 pp (in English)
'Heulandite subgroup'
Reference: Own find R. Lang 2005
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Reference: Zeolite Collection of Volker Betz
Pumpellyite-(Mg) ?
Formula: Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Colour: Blackish-dark green
Description: Found with zeolites in basaltic vesicles but refined analysis has not been carried out.
Reference: Von Bezing, L., Bode, R., and Jahn, S., (2008) Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern. 683 (in English).
Quartz
Formula: SiO2
Reference: Herbert Nägele
Quartz var: Amethyst
Formula: SiO2
Reference: Niedermayr, G. (2008): Talk on mineralogical news from Namibia.
Scolecite
Formula: CaAl2Si3O10 · 3H2O
Reference: Steffen, J., Kollonitsch, O. & Bast, R. (2006) Die Zeolithe vom Grootbergpass - in Namibia 2. Ed., 154-157 , Bode Verlag, Haltern
'Stilbite subgroup'
Reference: Rob Lavinsky

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
Group 9 - Silicates
Analcime9.GB.05Na(AlSi2O6) · H2O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Pumpellyite-(Mg) ?9.BG.20Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Scolecite9.GA.05CaAl2Si3O10 · 3H2O
Unclassified Minerals, Rocks, etc.
'Heulandite subgroup'-
'Stilbite subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Pumpellyite-(Mg) ?58.2.2.7Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Scolecite77.1.5.5CaAl2Si3O10 · 3H2O
Unclassified Minerals, Mixtures, etc.
'Heulandite subgroup'-
Quartz
var: Amethyst
-SiO2
'Stilbite subgroup'-

List of minerals for each chemical element

HHydrogen
H ScoleciteCaAl2Si3O10 · 3H2O
H LaumontiteCaAl2Si4O12 · 4H2O
H AnalcimeNa(AlSi2O6) · H2O
H Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
OOxygen
O Quartz (var: Amethyst)SiO2
O ScoleciteCaAl2Si3O10 · 3H2O
O LaumontiteCaAl2Si4O12 · 4H2O
O QuartzSiO2
O AnalcimeNa(AlSi2O6) · H2O
O Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
NaSodium
Na AnalcimeNa(AlSi2O6) · H2O
MgMagnesium
Mg Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
AlAluminium
Al ScoleciteCaAl2Si3O10 · 3H2O
Al LaumontiteCaAl2Si4O12 · 4H2O
Al AnalcimeNa(AlSi2O6) · H2O
Al Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
SiSilicon
Si Quartz (var: Amethyst)SiO2
Si ScoleciteCaAl2Si3O10 · 3H2O
Si LaumontiteCaAl2Si4O12 · 4H2O
Si QuartzSiO2
Si AnalcimeNa(AlSi2O6) · H2O
Si Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
CaCalcium
Ca ScoleciteCaAl2Si3O10 · 3H2O
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Bezing, L. von, Bode, R. & Jahn, S. (2008) Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern, (in English)

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