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Graulay (Graulai; Graulei; Grauley), Hillesheim, Eifel, Rhineland-Palatinate, Germany

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Latitude & Longitude (WGS84): 50° 16' 35'' North , 6° 40' 23'' East
Latitude & Longitude (decimal): 50.27639,6.67306
Köppen climate type:Cfb : Temperate oceanic climate
Name(s) in local language(s):Graulay (Graulai; Graulei; Grauley), Hillesheim, Eifel, Rheinland-Pfalz, Deutschland

An active quarry. Minerals are either included in xenoliths or occur as late-stage phases in thin fissures of pneumatolytic origin (zeolites and carbonates). The quarry is famous for a number of rare barium minerals and skeletal perovskite.

Owned by "Dieter Stolz Lavagruben" company.

NOTE: Entry is only allowed on Saturdays after 1 pm and on Sundays (situation March 2018,,46533.msg322645.html#msg322645).

Paragenesis is similar to that of the Löhley (Liley).

Mineral List

72 valid minerals. 3 (TL) - type locality of valid minerals.

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

0.0117 - 2.588 Ma

ID: 2620478

Age: Pleistocene (0.0117 - 2.588 Ma)

Description: volcanic

Lithology: Alkali basaltic and feldspathic basaltic tuff and glass

Reference: Toloczyki, M., P. Trurnit, A. Voges, H. Wittekindt, A. Zitzmann. Geological Map of Germany 1:M. Bundesanstalt für Geowissenschaften und Rohstoffe. [94]

Early Triassic
247.2 - 252.17 Ma

ID: 3157496
Early Triassic sandstone

Age: Early Triassic (247.2 - 252.17 Ma)

Lithology: Major:{sandstone}, Minor{siltstone,claystone,limestone}

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]

358.9 - 419.2 Ma

ID: 3186341
Paleozoic sedimentary rocks

Age: Devonian (358.9 - 419.2 Ma)

Lithology: Sedimentary 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

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)
Hentschel, G. (1987) Die Mineralien der Eifelvulkane. Weise Verlag München, 2. Auflage.
Hentschel, G. (1993) Die Lavaströme der Graulai: eine neue Fundstelle in der Westeifel. Lapis 18 (9), 11-23.
Meyer, W. (1994) Geologie der Eifel. Schweitzerbart Stuttgart.
Blaß, G., Emmerich, F., Graf, H.W., Schäfer, C., and Tschörtner, J. (2006) Minerale der Eifelvulkane. CD, published by authors.
Blaß, G. (2010) Die neuen Mineralienfunde aus der Vulkaneifel. Mineralienwelt, 21 (5), xx-xx.
Schüller, W. (2011) Neufunde aus der Eifel (5): 2008-2011. "König der Gipse" in der Graulai. Lapis 36 (5), 38-45.
Chukanov, N.V., Zubkova, N.V., Pekov, I.V., Belakovsky, D.I., Schüller, W., Ternes, B., Blaß, G., and Pushcharovsky, D.Y. (2012) Hillesheimite, (K,Ca,Ba,□)2(Mg,Fe,Ca,□)2[(Si,Al )13O23(OH)6](OH)·8H2O new phyllosilicate mineral of the gunterblassite group. Zapiski RMO 141 (3), 29-38.
Pekov, I.V., Chukanov, N.V., Britvin, S.N., Kabalov, Y.K., Göttlicher, J., Yapaskurt, V.O., Zadov, A.E., Krivovichev, S.V., Schüller, W., and Ternes, B. (2012) The sulfite anion in ettringite-group minerals: a new mineral species hielscherite, Ca3Si(OH)6(SO4)(SO3)·11H2O, and the thaumasite-hielscherite solid-solution series. Mineralogical Magazine, vol. 76, 1133-1152.
Blaß, G. and Kruijen, F. (2014) Die Neuigkeiten aus der Vulkaneifel (2/14). Mineralien-Welt 25 (5), 62-75 (in German).

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