General Crafting Materials - Zaexides/SteamWorld GitHub Wiki
Ingots
Both the Steaite and Ancite ingots are used in Tier 1 and 2 crafting recipes respectively. Steaite can simply be obtained via mining its ore with a diamond pickaxe and processing it in a furnace, but Ancite has to be found inside ancient structures.
Endritch Shards
Endritch Shards are the core material for Tier 3 crafting recipes. They are made via the second tier's Steam Assembler using two Ender Pearls, two Chorus Fruits and two Ancite Nuggets. By combining four shards you can craft an Endritch Block, of which two can be used together with an Ender Eye and any Tier 2 machine to create a Tier 3 machine.
Machine Base
The Machine Base is the core of any Tier 1 machine, and functions solely as the "casing" of a machine. It may look like a block, but it is not.
Steaite Crystal
The Steaite Crystal is the "fuel" for the Steam Assembler. It may be a bit expensive, but it'll last a long while.
Metal Dusts
Dusts are the result of putting an ingot or an ore into the Steam Grinder. Smelting them yields the corresponding ingots.
Nuggets
Nuggets can be used to craft various materials. Using 9 nuggets you can craft the ingot it used to be part of.