Mica Pegmatite, Gatineau, Quebec
A pegmatite is an igneous rock showing a very coarse texture, with large interlocking crystals usually greater in size than 1 cm ( in) and sometimes greater than 1 meter (3 ft). Most pegmatites are composed of quartz, feldspar, and mica, having a similar silicic composition to granite. However, rarer intermediate composition and mafic pegmatites are known.
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Keywords: coarse-grained, composition, crystal, deposits, dikes, feldspar, formations, gatineau, geological, grains, granitic, intrusive, large, mica, mineral, mineral-rich, minerals, pegmatite, pegmatites, pegmatitic, quartz, quebec, rare, rock, silicic, specimen, texture, veins
