andalusite

From Andalusia +‎ -ite, after the erroneous belief that it was from Andalusia.

andalusite (countable and uncountable, plural andalusites)

1. (mineralogy) An aluminium nesosilicate mineral, Al₂SiO₅, which can be cut into a gem and displays strong pleochroism, shifting between red, green, and yellow.

• David Barthelmy (1997–2025), “Andalusite”, in Webmineral Mineralogy Database.
• “andalusite”, in Mindat.org‎^[1], Hudson Institute of Mineralogy, 2000–2025.

andalusite f (invariable)

1. (mineralogy) andalusite

• adulantesi