Azurite

Nothing in this list is craftable in turn, so one Azurite is a single step: 4 units of material drawn from 2 base items, plus 5 crystals.

That bill outweighs 3,935 of the 13,602 recipes tracked here and 504 of the 2,216 Goldsmith ones, and 9,374 recipes nest deeper.

Both raw materials are gathered, and one of them is time-gated: Raw Azurite (4:00, 16:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

Azurite is itself consumed by 35 further recipes, spanning five of the eight crafting classes.