ˈlärviˌkīt noun
or laur·vik·ite ˈlau̇(ə)rv-
( -s )
Etymology: German larvikit, from Larvik, Norway, its locality + German -it -ite
: an alkali-syenite rock composed chiefly of cryptoperthite or anorthoclase in rhombic crystals and widely used as an ornamental building stone