One of the mysteries of the English language finally explained.
A grey, green, brown, or pink aluminosilicate mineral occurring mainly in metamorphic rocks as elongated rhombic prisms, sometimes of gem quality.
- ‘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.’
- ‘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.’
- ‘The spotted textures are marked by the growth of biotite, cordierite and andalusite on the metamorphic foliation.’
- ‘Monazite clusters occur in a variety of host minerals, including cordierite, quartz, biotite and andalusite.’
Early 19th century: from the name of the Spanish region of Andalusia + -ite.
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