Final answer:
Romans created stone reliefs by chiseling marble or stone slabs, with sculpted parts often attached to a solid background of the same material, and sometimes polished for a refined finish.
Step-by-step explanation:
The Romans made stone reliefs primarily by chiseling away at slabs of stone, such as marble, to create raised images. Sculpted remains were then often attached to a solid background of the same material. Unlike mosaics, which utilized small pieces of colored material like glass or clay, stone reliefs required the artist to carefully subtract material, using a range of tools from larger chisels for rough shaping to finer tools for detailed work.
To achieve the final form, a combination of different sized chisels and drills were used for refining the sculpture and finishing touches were made using emery powder. Some relief sculptures were also polished to give a more distinct finish to the piece.