Very coarse igneous rock
Description: Very large milky quartz with lesser K feldspar and muscovite mica. Looks similar to parts of the Foxdale Granite pegmatites. Presumably it's part of a nearby felsic intrusion which has caused the mineralisation. Part of Dr Gerhard Bersu's 1940 excavation for manganese.
Taxonomic name: Manx Group: pegmatite
Collection: Natural History Geology Collection
ID number: 1966-0033/12