Min. Obs. [a. F. thallite (J. C. Delamétherie, 1792), f. Gr. θάλλ-ειν to flourish, bloom, or θαλλός young, shoot (in allusion to its color) + -ITE1.] A rejected name for EPIDOTE occurring in yellowish-green crystals.
1802. Bournon, in Phil. Trans., XCII. 291. The substance called thallite (the epidote of the Abbé Hauy).
1868. Dana, Min. (ed. 5), 284. Thallite was rejected because it was based on a varying character, color.