_std/defines/materials.dm

MATERIAL_CRYSTAL	Crystals, Minerals
MATERIAL_METAL	Metals
MATERIAL_CLOTH	Cloth or cloth-like
MATERIAL_ORGANIC	Coal, meat and whatnot.
MATERIAL_ENERGY	Is energy or outputs energy.
MATERIAL_RUBBER	Rubber , latex etc
MATERIAL_WOOD	Wood, or wood-like
/var/RARITY_COLOR	Global static list of rarity color associations
/var/material_category_names	Material category names as displayed in fabricators see match_material_pattern() for exact definitions
/var/triggerVars	This contains the names of the trigger lists on materials. Required for copying materials. Remember to keep this updated if you add new triggers.

Define Details

Cloth or cloth-like

Crystals, Minerals

Is energy or outputs energy.

Metals

Coal, meat and whatnot.

Rubber , latex etc

Wood, or wood-like