When held, the Grass Gem increases the power of a damaging Grass-type move by 30%. It is consumed after first use.
Only the final type of a move is considered, so moves that vary type (e.g. Nature Power) or moves changed by abilities (e.g. Pixilate) are boosted by the type of Gem the move turns into.
The Gem is not used if the attack misses.
In Generation 5 Grass Gem increases the power by 50%.
A gem with an essence of nature. When held, it strengthens the power of a Grass-type move only once.
A gem with an essence of nature. When held, it strengthens the power of a Grass-type move one time.