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Glassberget (Ørsdalen), Bjerkreim, Rogaland, Norwayi
Regional Level Types
Glassberget (Ørsdalen)Prospect

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Name in Norwegian:Glassberget, Bjerkreim, Rogaland, Norge
Latitude & Longitude (WGS84): 58° 41' 40'' North , 6° 23' 37'' East
Latitude & Longitude (decimal): 58.69457,6.39388
GeoHash:G#: u4ktcmpbs
Locality type:Prospect
Köppen climate type:Cfc : Subpolar oceanic climate
Nearest Settlements:
Gilja248 (2013)14.7km
Vikeså715 (2010)18.6km
Tonstad751 (2010)19.0km
Oltedal725 (2013)25.4km
Moi1,740 (2010)28.0km

Quartz crystal occurrence on private land, permission to collect must be obtained from the landowner.
The locality is known since the World War 1, and was claimed by Mr. H.G. Andersen in 1985.

The locality has often been referred to as Glassberget, Ørsdalen. This is not entirely correct, as the locality lies in the neighboring Austdalen.

Regions containing this locality

Eurasian PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

Mineral List

1 valid mineral. 1 erroneous literature entry.

Detailed Mineral List:

Formula: SiO2
Reference: Berrenrath, R.(1995): Bemerkenswerte eigenfunde in Lapis. Phantomquartz aus Norwegen. LAPIS 20 (1), 60
Quartz var: Citrine
Formula: SiO2
Description: There has not been found any yellow quartz at the Glassberget locality. The yellow quartz originate from a nearby locality, see "citrine" locality
Reference: P. Andresen collection (2006)
Quartz var: Rock Crystal
Formula: SiO2
Reference: Knudsen, Å. (1985): Glassberget jevnes med jorden!. NAGS-nytt 12(3): 32-34

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
var: Citrine ?4.DA.05SiO2
var: Rock Crystal4.DA.05SiO2

List of minerals arranged by Dana 8th Edition classification

Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Mixtures, etc.
var: Citrine ?-SiO2
var: Rock Crystal-SiO2

List of minerals for each chemical element

O QuartzSiO2
O Quartz (var: Rock Crystal)SiO2
O Quartz (var: Citrine)SiO2
Si QuartzSiO2
Si Quartz (var: Rock Crystal)SiO2
Si Quartz (var: Citrine)SiO2

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

541 - 2500 Ma

ID: 3186372
Proterozoic crystalline metamorphic rocks

Age: Proterozoic (541 - 2500 Ma)

Lithology: Granitoid gneiss; orthogneiss/paragneiss

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]

Mesoproterozoic - Paleoproterozoic
1000 - 2500 Ma

ID: 3130876
Proterozoic I granite

Age: Proterozoic (1000 - 2500 Ma)

Description: undifferentiated metamorphic

Lithology: Major:{granite}, Minor{granodiorite-diorite group,meta-granite,meta-granodiorite-diorite group}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Magnus, J. (1985): Kongen på "Glassberget". NAGS-nytt 12 (1): 28
Knudsen, Å. (1985): Glassberget jevnes med jorden! NAGS-nytt 12(3): 32-34
Berrenrath, R. (1995): Bemerkenswerte eigenfunde in Lapis. Phantomquartz aus Norwegen. LAPIS 20 (1), 60

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