Correct spelling for the English word "tuesite" is [tjˈuːsa͡ɪt], [tjˈuːsaɪt], [t_j_ˈuː_s_aɪ_t] (IPA phonetic alphabet).
A mineral of a bluish or milk-white colour, found on the banks of the river Tweed in the upper Old Red Sandstone-makes excellent slate-pencils.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.