There are 12 different gem leagues:

• Sapphire I

• Sapphire II

• Sapphire III

• Emerald I

• Emerald II

• Emerald III

• Fire Ruby I

• Fire Ruby II

• Fire Ruby III

• Black Diamond I

• Black Diamond II

• Black Diamond III

Your group can be both promoted and relegated in these leagues. Each league has different perks attached to it.