Gemmacoeus or Gemmaceous: How To spell?

The word Gemmacoeus is misspelled against Gemmaceous, an adjective meaning "pertaining to gems to gemmae; the nature resembling, gems gemmae."

Word contains consecutive vowels 'EO' in between alphabets gemmac & us is misspelled as 'OE'
Wrong Spelling:  gemmac-oe-us 
Correct Spelling:  gemmac-eo-us 
Check more misspelled words of Gemmaceous to spell it correct.