Silver Spectacles

Taken all the way down to base materials, one Silver Spectacles is 3 crafting steps deep and needs 3 intermediates — Clear Glass Lens ×1, Silver Ingot ×1 and Natron ×1 — which resolve to 4 distinct raw materials totalling 6 units, plus 11 crystals.

That bill outweighs 4,542 of the 13,602 recipes tracked here and 643 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 7 are burned by the intermediates, so the real crystal cost is 5 Water Shard, 4 Wind Shard and 2 Fire Shard.

The chain crosses two disciplines — Goldsmith to Lv 24 and Alchemist to Lv 28 — so no single class can finish it unaided.

One intermediate outranks the result: Clear Glass Lens is a Lv 28 Alchemist recipe feeding a Lv 24 craft, so that step, not the last one, is the real gate.

All 4 raw materials are gathered, and not one of their spots is timed, so nothing in the tree waits on the Eorzean clock.