Ploenaste or Pleonaste: How To spell?

The word Ploenaste is misspelled against Pleonaste, a noun meaning "A black variety of spinel."

Word contains consecutive vowels 'EO' in between alphabets pl & naste is misspelled as 'OE'
Wrong Spelling:  pl-oe-naste 
Correct Spelling:  pl-eo-naste 
Find more incorrect spellings of Pleonaste to spell right way.