What features can you observe in a rock sample or outcrop that would permit you to recognize a rock is being metamorphic, rather than igneous or sedimentary?

Sedimentary rock, rock formed at or near the Earth’s surface by the accumulation and lithification of sediment (detrital rock) or by the precipitation from solution at normal surface temperatures (chemical rock). Sedimentary rocks are the most common rocks exposed on the Earth’s surface but are only a minor constituent of the entire crust, which is dominated by igneous and metamorphic rocks.

rocks,minerals, pebbles, sand