In one tale, the Gongs sack Linwë's halls and Linwë is slain and the gold is carried far away. Beren Ermabwed falls upon them at a crossing of Sirion and the treasure is cast into the water, and with it the Silmaril of Fëanor. The Nauglath (Wicked dwarves) that dwelled nigh dove after the gold but only one mighty necklace of gold (and that Silmaril is on it) did they find. This became the mark of their king.
Orcs or Gong were said to have guarded Glorund's treasury, the evil dwarf Mim was their captain.
Not long after the formation of Isle of Íverin from the western half off Tol Eressëa near the Great Lands the Battle of Rôs occurs. The Island-elves and the Lost Elves fought against against Nautar, Gongs, Orcs, and a few evil Men. The elves were defeated. The fading Elves retired back Tol Eressëa and hid in the woods. Men came to Tol Eressëa and also the evil Orcs, Dwarves, Gongs, Trolls, etc. The elves continued to faded with sorrow no longer able to breath the air of the men who were their equals or greater; and men became more powerful and numerous. The Fairies grew small and tenuous, filmy and transparent, while the men became larger and more dense, and could no longer see the fairies.
Gong may be mistaken as another word for the Kaukareldar (false-fairies) but they are unrelated.
Behind the scenesEdit
Gong is compared to Sithagong 'dragonfly' (sitha 'fly', Sithaloth or Sithaloctha ('fly-cluster'), the Pleiades).