Correct spelling for the English word "Jaspideous" is [d͡ʒaspˈɪdi͡əs], [dʒaspˈɪdiəs], [dʒ_a_s_p_ˈɪ_d_iə_s] (IPA phonetic alphabet).
Like jasper; consisting of jasper.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.