An artistic bronze work by Robert Vogel, which has become iconic, demonstrates the use of relief patterns on the inner surface of an egg-shaped shape, which give the impression of erosion or weathering.

Perhaps it will do:
https://3dsky.org/3dmodels/show/sculpture_robert_fogell_02_1 

Units: Millimeters
Material: Corona PhysicalMtl
UVs: All Unwrapped UVs
Polys: 2612