Since formation, Zumurrud has been modified by viscous relaxation (forming an updomed floor like those seen in similar-sized craters on Enceladus, like Shahrazad), tectonic fracturing along the crater's rim, forming canyons hundreds of meters deep, and subsequent cratering, like the small crater along Zumurrud's western rim. In addition, brightness variations can be seen along the eastern crater wall, suggesting variations in water ice grain size.
Since its formation, Zumurrud has been altered by viscous relaxation (creating an upraised floor like those found in similar-sized craters on Enceladus, such as Shahrazad), tectonic cracking along the crater's edge, forming deep canyons, and subsequent cratering, including a small crater near Zumurrud's western rim. Additionally, brightness variations are observed along the eastern crater wall, indicating differences in water ice grain size.