Gneyss or Gneiss: How To spell?

The word Gneyss is misspelled against Gneiss, a noun meaning "A crystalline rock, consisting, like granite, of quartz, feldspar, and mica, but having these materials, especially the mica, arranged in planes, so that it breaks rather easily into coarse slabs or flags. Hornblende sometimes takes the place of the mica, and it is then called hornblendic / syenitic gneiss. Similar varieties of related rocks are also called gneiss."

Word contains consecutive vowels 'EI' in between alphabets gn & ss is misspelled as 'EY'
Wrong Spelling:  gn-ey-ss 
Correct Spelling:  gn-ei-ss 
Explore spell check of Gneiss to spell without errors.