What do genies lamps look like?

In popular culture, genies' lamps are often depicted as ornate, Middle Eastern-style oil lamps made of brass or copper, with intricate carvings and colorful gemstones embedded in them. They are typically depicted as being small enough to be held in one hand, with a spout from which the genie emerges when the lamp is rubbed. However, there is no single definitive description of what a genie's lamp looks like, and depictions vary widely in different works of art, literature, and film.