GEMMIEST is a playable word

gemmy Scrabble® Dictionary

adjective
gemmier, gemmiest
resembling a gem
98 Playable Words can be made from "GEMMIEST"
   2-Letter Words (12 found)
   3-Letter Words (28 found)
   6-Letter Words (3 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)