Chromite Ingot ★★

Taken all the way down to base materials, one Chromite Ingot is 2 crafting steps deep and needs 1 intermediate — Molybdenum Ingot ×1 — which resolves to 4 distinct raw materials totalling 11 units, plus 9 crystals.

That bill outweighs 5,999 of the 13,602 recipes tracked here and 555 of the 1,441 Armorer ones, and 4,464 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 5 are burned by the intermediates, so the real crystal cost is 5 Fire Crystal, 2 Earth Cluster and 2 Ice Cluster.

The chain crosses two disciplines — Armorer to Lv 70 and Blacksmith to Lv 68 — so no single class can finish it unaided.

3 of the 4 raw materials come out of the ground, and one of them is time-gated: Chromite Ore (10:00, 22:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

Chromite Ingot is itself consumed by 121 further recipes, spanning six of the eight crafting classes.