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Goboboseb Mts, Brandberg Area, Dâures, Erongo Region, Namibia

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Latitude & Longitude (WGS84): 21° 9' 5'' South , 14° 18' 20'' East
Latitude & Longitude (decimal): -21.15139,14.30556
Age:132.14 ± 0.40 to 131.90 ± 0.58 Ma
Geologic Time:Early Cretaceous
Dating method:The most recent dates (#40#Ar-#39#Ar) for the Awahab quartz latite units are 132·14 ± 0·40 and 131·90 ± 0·58 Ma for the Gobobseb quartz latite Units I and II, and 132·03 ± 0·40 Ma for the Springbok quartz latite, the ages overlapping within experimenta
Reference for age:
Köppen climate type:BWk : Cold desert climate

The Goboboseb Mountains cover an area of 1100 km² and are assigned to the Awahab Formation consisting of interbedded basalts & quartz latites that form part of the 132-135 million-year-old Etendeka Group. Strong evidence suggests the source of the Gobobobseb volcanic rocks comes from the Messum Complex. The highest peak of these mountains is the Tafelkop.

NOTE: The actual mountains where the famous amethyst and quartz crystals (sometimes in sceptre form) is mined are the Goboboseb Mountains (basalts of volcanic origin), located approximately 35 km west of the Brandberg (specimen labels often give the locality as Brandberg). The name "Brandberg crystal" or "Brandberg quartz" originates from the fact that the Brandberg (granite massif!) is a worldwide known name and it is easier to explain than the Goboboseb range.

Mineral List

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

25 valid minerals. 1 erroneous literature entry.

Rock Types Recorded

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

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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

Cretaceous - Jurassic
66 - 201.3 Ma

ID: 3307724

Age: Mesozoic (66 - 201.3 Ma)

Lithology: Plutonic

Reference: Thiéblemont, D. (ed.). New edition of the 1:10,000,000 geological map of Africa. CGMW-BRGM. [190]

Early Cretaceous
100.5 - 145 Ma

ID: 3192353
Mesozoic volcanic rocks

Age: Early Cretaceous (100.5 - 145 Ma)

Stratigraphic Name: Etendeka Flood Basalt

Lithology: Mafic volcanic rocks

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, used under Creative Commons Attribution 4.0 License

Localities in this Region


This page contains all mineral locality references listed on 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 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.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Henn and Lieber (1993) Lapis Magazine: 10: 48.
Niedermayr, G., Palfi, A., and Wartha, R. (2002) Neue Amethyst- und Rauchquarzfunde aus den Goboboseb-Bergen in Namibia. Mineralien-Welt Magazine: 13 (6): 72-75 (in German).
Cairncross, B. and Bahmann, U. (2006) Minerals from the Goboboseb Mountains, Brandberg Region, Namibia. Rocks & Minerals: 81 (6): 442-457.
Cairncross, B. and Bahmann, U. (2007) Zepterquartz und prehnite vom Tafelkop, Namibia. Lapis, 32(6), 31-36.
von Bezing, L., Bode, R., and Jahn, S. (2007) Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern, 259-266 (in German).
Böllinghaus, T. and van der Smit, M. (2007) Prächtige Amethyst-Fensterquarze aus den Goboboseb-Bergen. Lapis Magazine: 32 (6): 37-43.
Niedermayr, G., and Schnaitmann, E.A. (2010) Neuigkeiten aus Namibia. Mineralien-Welt Magazine: 21 (6): 89-96.

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