In Oni, all materials are embers of groups. These groups define what you can do with the materials. E.g. you can only build pipes with materials in the "Plumbable" group.
Solid
Flammable
Generic Buildable
Liquid
Metal Ore
Refined Metal
Gas
Unbreathable Gas
Light Emitter
Liquefiable
Toxic
Raw Mineral
Plumbable
Consumable Ore
Crushable
Manufactured Material
Unstable
Bait
Ore
Ice
Water Based
Miscellaneous
Rare Resource
Organic
Transparent
Plastic
Agriculture
Precious Rock
Filtration Medium
Cultivable Soil
Mixture
Combustible Liquid
Breathable Gas
Wood
Refined Mineral
Antiseptic
Compostable
Coal
Special
Hydrocarbon
Alloy
Combustible Gas
Fiber
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K