Definition of andalusite in English:



mass noun
  • A grey, green, brown, or pink aluminosilicate mineral occurring mainly in metamorphic rocks as elongated rhombic prisms, sometimes of gem quality.

    • ‘The spotted textures are marked by the growth of biotite, cordierite and andalusite on the metamorphic foliation.’
    • ‘In sample IK99-31 chloritoid is in equilibrium with kyanite, andalusite and chlorite.’
    • ‘The aluminium silicate minerals andalusite, kyanite, and sillimanite are good examples of this phenomenon of polymorphism.’
    • ‘Monazite clusters occur in a variety of host minerals, including cordierite, quartz, biotite and andalusite.’
    • ‘From Pliocene time the shallow emplacement of intrusive bodies resulted in thermal metamorphism (forming, for example, biotite, cordierite, andalusite, K-feldspar and corundum in pelites) and hydrothermal activity.’


Early 19th century: from the name of the Spanish region of Andalusia + -ite.