A hard rock with some uses in construction. Gneiss is a metamorphic rock formed from previous rock recrystallizing at high pressures and temperatures deep in the earth.
Weight7000 gMax stack20Carried on backResource pile
Notes
Gneiss is a metamorphic rock that appears as a solid, excavatable block and is mined with a tier 4 pickaxe or better. As a building ingredient, gneiss can be processed into Ashlar Gneiss blocks or crushed into aggregate grades (Lv2 and Lv3) for construction recipes, and it also serves as a component for a range of stations like the Arrastra, Carpentry Table, and Grindstone. If you are developing a masonry or advanced stonework specialty, stockpiling gneiss early is useful since it feeds into several mid-tier building-material chains as well as geology research.
Notes are AI-generated and may be imprecise.
As a block
Mining hardness4On miningdrops rubbleSolidWall
Mining
Hardness 4 is the minimum pickaxe tier that can mine this block.
The descriptive prose on this wiki is written by a large language model — but it runs entirely on local, self-hosted hardware: a Gemma 4 E4B model on a single NVIDIA RTX 4070 in a home Unraid server.
Nothing you read here was generated by a commercial cloud API. The game data itself is pulled live from the Eco server; the AI only fills in flavor and gap text. Like any web server, this one keeps its own request log — including visitors' IP addresses — purely to run and improve the site; it is never sold or handed to a third party.
This wiki is one face of a larger Eco mod: Solomon, an in-world AI steward that runs the server's economy, posts help contracts, keeps a store, and answers players. The wiki reads the same live game registries and tools Solomon does — so the numbers stay true to the running world. Read more about the project →
✨ Ask Solomon
Ask me anything about the Eco game — recipes, skills, animals, biomes. I read this wiki to answer, and you'll watch me look things up.