“Bringing The Past, Into the Future”

Northern Geological Supplies Ltd
Northern Geological Supplies Ltd

“Bringing The Past, Into the Future”

Pegmatite

This granite pegmatite contains large sheets of muscovite mica, orthoclase feldspar and quartz matrix. An excellent teaching material which comes from Southern Norway. Each specimen comes in a labelled card tray.

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SKU: IGNROK027 Category:

Most pegmatites are similar in composition to granite containing quartz, feldspars & micas. The most striking features of this igneous rock are the large crystals, usually over 1" (2.5cm) in size. Some can even be metres across & demonstrate perfect textbook morphological examples. To attain this size the crystallisation mechanism would need to have been very protracted. Pegmatite bodies tend to be small & marginal to other igneous intrusives. Their mode of formation is uncertain but they could be derived from high temperature & pressure magmatic, metasomatic or metamorphic processes, or a combination

Additional information

Weight 130 g
Specimen Size

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