* Literal: The stars twinkled like diamonds scattered across the firmament.
* Figurative: His dreams were vast, reaching for the firmament of human potential.
* Poetic: The moon, a silver coin, hung in the velvety firmament.
* Historical: Ancient astronomers charted the constellations across the celestial firmament.
* Formal: The artist depicted the angels ascending to the firmament in a vibrant fresco.