Monzonite
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Monzonite is an igneous intrusive rock, formed by slow cooling of underground magma that has a moderate silica content and is enriched in alkali metal oxides. Monzonite is composed mostly of plagiocla
Monzonite specimen from Rock Library (NASA JPL)
Photomicrograph of thin section of monzonite (in plane polarised light)
The Notch Peak monzonite intrusion in Utah inter-fingers (partly as a dike) with highly metamorphosed Cambrian carbonate host rocks
Larvikite
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Larvikite is an igneous rock, specifically a variety of monzonite, notable for the presence of thumbnail-sized crystals of feldspar. These feldspars are known as ternary because they contain significa
Monzonite
…metal oxides. Monzonite is composed mostly of plagioclase and alkali feldspar. Syenodiorite is an obsolescent term for monzonite or for monzodiorite. Larvikite is a particular form of monzonite. Monzonite is a coarse-grained (phaneritic) igneous rock. Such rocks are classified by their relative percentages of…
Larvikite from Larvik, Norway
A larvikite quarry in Larvik, Norway, 2008
Polished larvikite (marketed as "Blue Pearl Granite"), showing labradorescence, is a popular decorative stone.