See also GEM.

• Gem is short for:
  • a cut rock or mineral, a gemstone
  • an engine made by Rolls-Royce plc, the Gem , primarily for use in the AugustaWestland Lynx helicopter.

• Jem (which sounds like gem) could be:
  • a television animated series which aired in the mid-1980s, see Jem (animated)
  • the musician Jemma (Jem) Griffiths: see Jem (singer).
  • a character in Harper Lee's To Kill a Mockingbird
  • the 1980 book by Frederik Pohl, see Jem (book) .
  • an Ibanez electric guitar designed by musician Steve Vai