Crystal Glass ★★

Taken all the way down to base materials, one Crystal Glass is 2 crafting steps deep and needs 1 intermediate — Natron ×1 — which resolves to 4 distinct raw materials totalling 6 units, plus 7 crystals.

That bill outweighs 4,542 of the 13,602 recipes tracked here and 917 of the 1,591 Alchemist ones, and 4,464 recipes nest deeper.

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

Every step is Alchemist work, from a Lv 25 intermediate up to the Lv 50 finish, so one class covers the whole chain.

3 of the 4 raw materials match a gathering node, none of them timed; the other 1 comes from vendors, drops or content this site does not track.

Crystal Glass is itself consumed by 79 further recipes, spanning seven of the eight crafting classes.