PEGMATITE WITH BIOTITE MICA, FELDSPAR AND QUARTZ - Norway
« backPEGMATITE CONTAINING
BIOTITE MICA, FELDSPAR
AND QUARTZ
Evje, Aust-Agder Region, Norway
A good specimen of black biotite mica with feldspar and quartz from a course-grained igneous rock known as a pegmatite.
Mica is a remarkable mineral. Due to weaknesses between the layers of atoms it splits easily in one direction - a property known as cleavage - and continued splitting creates thin, flexible sheets. The black variety is called biotite.
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Size: approx. 12.5 x 7 x 4.5 centimetres
Weight: 483 grams
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