Gemma is a recurring term in the Mana series. Individually, it can refer to:
- The seed of the Tree of Mana.
- The unseen character from Sword of Mana.
- The non-player character from Secret of Mana (called "Jema" in the Super NES version).
- In Children of Mana, certain gems have Gemma in their names as a reference.
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