The word "Miascite" is a rare term, which refers to a mineral that has a black or brownish-black color. The pronunciation of this word is [maɪəsˈsaɪt], where "maɪəs" rhymes with "buyers" and "saɪt" rhymes with "height". The spelling of "Miascite" may be confusing for some, as the sequence "ia" usually corresponds to the sound /aɪ/ as in "bias" or "dialect." However, in this case, the "i" and "a" are pronounced separately, creating the /iə/ sound.
A granite rock, consisting of cleavable white felspar, black mica, and greyish or yellowish-white elaeolite with some hornblende.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.