(Karlovarský Kraj)
Surrounding of locality is composed of relicts of denuded tertiary vulcanites in mica schists of the Klínovec series. Loučná body is petrographically mostly nephelinite and its differenciates (olivinic, glassy, sodalitic, leucitic and doleritic nephelinites). Phenocrysts are pyroxenes (augite, titanaugite and aegirinaugite), biotite, titanite, perovskite, apatite and rarely melanite. Mineralogically interesting are vein rocks of phonolite composition with large pseudomophs after leucite. Those are often 3 to 10 cm large, composed of white of yellowish mass of approximately 80 % K-feldspar (sanidine or adulare) and 20 % illite.
Mineral List:3 entries listed. 2 valid minerals.
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