Modifiers matching rock:

• angular,
• hard,
• polycrystalline,
• decorative,
• sedimentary,
• metamorphic,
• brittle,
• volcanic,
• fragile,
• reactive,
• intermediate,
• common,
• powdered,
• sticky,
• igneous,
• dark,
• resistant,
• heated,
• ornamental,
• ingenious,
• crystalline,
• heterogeneous,
• crustal,
• flat,
• durable,
• softer,
• available,
• vitreous,
• fragmented,
• modern,
• good,
• soft,
• large,
• bituminous,
• porous,
• abrasive,
• granular,
• hot,
• opaque,
• inert,
• simple,
• artificial,
• chemical,
• deleterious,
• barren,
• terrestrial,
• exotic,
• older,
• textured,
• natural,
• small,
• impervious,
• weak,
• isolated,
• firm,
• anisotropic,
• harder,
• elastic,
• salt,
• ductile,
• related,
• acid,
• marine,
• geological,
• rough,
• alkaline,
• unconsolidated,
• flinty,
• conductive,
• frozen,
• coloured,
• aluminous,
• carbonaceous,
• eruptive,
• dense,
• tough,
• metallic,
• polished,
• impermeable,
• extraterrestrial,
• primary,
• geologic,
• widespread,
• free,
• russian,
• sharp,
• impenetrable,
• fine,
• new,
• flying,
• subsurface,
• enough,
• smooth,
• uniform,
• surrounding,
• basic,
• indigenous,
• non-porous,
• lighter,
• clastic,
• glassy,
• size,
• coarse,
• base,
• homogeneous,
• intrusive,
• massive,
• abundant,
• noble,
• polyphase,
• useful,
• pulverized,
• sedentary,
• rigid,
• unstable,
• industrial,
• inappropriate,
• planetary,
• stronger,
• normal,
• insoluble,
• consolidated,
• calcareous,
• friable,
• british,
• original,
• siliceous,
• heavier,
• light,
• visible,
• argillaceous,
• spherical,
• organic,
• local,
• korean,
• colorful,
• rich,
• white,
• loose,
• compact,
• acidic,
• virgin,
• soluble,
• heavy,
• precious,
• looking,
• dated,
• weaker,
• typical,
• combustible,
• magnetic,
• reflective,
• smaller,
• lightweight,
• nonporous,
• ordinary,
• azonic,
• difficult,
• colored,
• unusual,
• red,
• underlying,
• crumbly,
• native,
• suitable,
• solid,
• strong,
• traditional,
• tight,
• extrusive,
• refractive,
• covered,
• crushed,
• dry,
• hardest,
• plutonic,
• stable,
• competent,
• refractory,
• permeable,
• molten,
• egyptian,

Simple categories matching volcanic:

• rock,
• marker,
• substrate,
• material,
• lava,
• island,
• stone,
• form,
• feature,
• phenomenon,
• substance,
• deposit,
• action,
• flow,
• structure,
• episode,
• centre,
• cone,
• unit,
• product,
• precursor,
• condition,
• process,
• sediment,
• depression,
• mineral,
• domain,
• formation,
• system,
• activity,
• emanation,
• hazard,
• stratum,
• sand,
• component,
• event,
• eruption,