from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A soft mica having a green hue and a high iron content.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A blueish-green form of mica.
from The Century Dictionary and Cyclopedia
- n. A green earthy silicate of iron, magnesium, and potassium, first described from cavities in amygdaloid near Verona: hence called green earth of Verona.
From French celadon ("sea-green") + -ite (Wiktionary)