Luxullianite (also Luxulyanite, Luxulianite) is a rare type of granite, notable for the presence of clusters of radially arranged acicular tourmaline crystals enclosed by phenocrysts of orthoclase and quartz in a matrix of quartz, tourmaline, alkali feldspar, brown mica, and cassiterite. Quarrying granite for the Mormon Temple, Utah Territory. ... The tourmaline mineral group is chemically one of the most complicated groups of silicate minerals. ... Example of phenocrysts in rhomb porphyry from the Oslo rift area in Norway A phenocryst is a relatively large and usually conspicuous crystal formed in the mass of a porphyritic igneous rock. ... Orthoclase (KAlSi3O8) is an important igneous rock forming tectosilicate mineral. ... Quartz is amongst one of the most common minerals in the Earths continental crust. ... The matrix or groundmass of an igneous rock consists of fine grained often microscopic crystals in which larger crystals (phenocrysts) are embedded. ... rock with mica Mica sheet mica flakes The mica group of minerals includes several closely related materials having highly perfect basal cleavage. ... Cassiterite is a tin oxide mineral, SnO2. ...

The name originates from the village of Luxulyan in 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 Cathedral in London. Luxulyan (pronounced ) (also spelled Luxullian, Luxulian) is an English village, valley, and parish (2001 population 1,371) in the borough of Restormel, central Cornwall. ... Motto: Onen hag oll (Cornish: One and all) Geography Status Ceremonial and (smaller) Non-metropolitan county Region South West England Population - Total (2004 est. ... Royal motto (French): Dieu et mon droit (Translated: God and my right) Englands location (dark green) within the British Isles Languages None official English de facto Capital None official London de facto Largest city London Area – Total Ranked 1st UK 130,395 km² Population – Total (mid-2004) – Total (2001... Arthur Wellesley, 1st Duke of Wellington, KG, GCB, GCH, PC, FRS (c. ... St Pauls Cathedral from the south St Pauls Cathedral is a cathedral on Ludgate Hill, in the City of London, and the seat of the Bishop of London. ... This article is about the British city. ...