(Urstad feltspatbrudd, Hidra, Flekkefjord kommune, Vest-Agder fylke, Norge)
A old feldspar quarry in granite pegmatite. Especially noted for large Aeschynite-(Y) crystals (> 3 kg). Chunks of aeschynite-(Y)up to 20 kg has been found here.
References:
- Brøgger, W.C. (1879): Untersuchungen norwegischer Mineralien I. Zeitschrift für Krystallographie und Mineralogie 3, 471-487 (+ plates XI-XIII)[first crystallographic description on aeschynite-(Y) from Urstad]
- Brøgger, W.C. (1906): Die Mineralien der Südnorwegischen Granitpegmatitgänge, I. Niobate, tantalate, titanate und titanoniobate. Videnskapsselskapets Skrifter. I.Mat-Naturv. Klasse 1906, 6.[p.97-104- first description of blomstrandine = Aeschynite -(Y)]
Mineral List:4 entries listed. 2 valid minerals. 1 type locality (valid mineral).
The above list contains all mineral locality references listed on mindat.org. 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!
