Feldspar quarry in pegmatite. Most of the rare earth elements were discovered in gadolinite from Ytterby. Has given name to Ytterbium, Yttrium, Terbium, Erbium. Other elements discovered here: Gadolinium, Holmium, Thulium, Scandium, Lutetium, Tantalum.
NB: Prohibited to collect at this historical site by Swedish law since middle of the 70-ies!
References:- Klaproth, M.H. (1802): Chemische Untersuchung des Gadolinits, Beiträge zur chemischen Kenntniss der Mineralkörper, Dritter Band, Rottmann Berlin, 52-79.
- Mason, B. (1971): Ytterby, Sweden: a classic mineral locality, Mineralogical Record, 2(3), 136-138.
- Kjellman et al. (1999): Canadian Mineralogist 37, 832-833.
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http://en.wikipedia.org/wiki/Ytterby
49 entries listed. 36 valid minerals. 3 type localities (valid minerals).
