Physically very solid; very difficult to move. / (figuratively) Very strong and dependable.

clear, colourless form of the silica-based mineral quartz, often called "pure quartz" or "clear quartz".

(informal) To progress in a smooth fashion.

simple past tense and past participle of rock along

Third-person singular simple present indicative form of rock along

(music) A subgenre of heavy metal which combines it with elements of psychedelic rock and acid rock.

plural of rock face

Alternative form of rock and roll

(music) A subgenre of experimental, intellectual rock music, often presented as a suite of pieces with a story or theme.

plural of sedimentary rock