Luxullianite (also Luxulyanite, Luxulianite) is a rare type of
granite, notable for the presence of clusters of radially arranged acicular tourmalinecrystals enclosed by phenocrysts of orthoclaseand quartzin a matrix of quartz, tourmaline, alkali feldspar, brown mica, and cassiterite.
The name originates from the village of
Luxulyanin Cornwall. England, where this type of granite is found. An example may be seen in the Duke of Wellington's monument at St Paul's Cathedralin London.
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Luxullianite — Lux*ul li*an*ite, n. [So called from Luxullian, in Cornwall.] (Min.) A kind of granite from Luxullian, Cornwall, characterized by the presence of radiating groups of minute tourmaline crystals. [1913 Webster] … The Collaborative International Dictionary of English
luxullianite — … Useful english dictionary
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