|“||Crafting Material. Created at the Ringcrafting Bench.||”|
— Item Tooltip
Diamonds are used for the Ringcrafting profession, crafting the Infinity Diamond (one of the elements of Neon Nightsky wings), and crafting (nontradable) Starlight Dragon Souls. They can either be crafted at a Ringcrafting Bench, or can rarely be found in Miner's Troves.
Diamonds are used for crafting every tier of ring boxes except for the first, where no diamonds are needed, and the last, where Shadow Diamonds are used.