Aurania Elemental Dungeons
The four elemental dungeons are the bridge from Platinum Jewellery to Aura Jewellery. Each dungeon belongs to one main-stat set, so run the one required by your class first.
Dark Forest
Ruby → Aura Ruby
STR
Underwater World
Sapphire → Aura Sapphire
INT
Mystic Valley
Emerald → Aura Emerald
DEX
Crystal Cave
Topaz → Aura Topaz
STA
The current Wiki recommends roughly 950,000 HP and Shiny-level damage. A tank and a strong 1-on-1 damage dealer make the boss encounters much safer for a new group.
Besides Jewellery materials, all four dungeons can drop Scrolls of Awakening Augmentation and Scrolls of Fusion Awakening Augmentation. Their dungeon-ranking rewards also include elemental Magic Stones, orb containers and Loyalty Treasures.
For the Jewellery-Exchange go to [Aurania Exchanger] Lucy.