Gem & Jam releases full 2018 line-up with Big Wild, Papadosio, Subsquabi, and more Gem & Jam is making the statement in the jamtronica/bluegrass scene with their phase two additions. Watch the 2017 after movie. See the full line-up here. Related Posts: Haywyre adds ‘Wisdom’ to Lost In Dreams REAPER gets heavy with new Bassrush release, ‘Make A Move’