Wiktionary
pumicelike
a. Resembling or characteristic of pumice.
Usage examples of "pumicelike".
To complete the act, the muscle membrane door contracted quietly, its grey pumicelike surface becoming an intractable barrier, sealing everyone inside.
New residents planted the genetically tailored kernels along the bases of their houses, carefully tending the long flat strands of spongy pumicelike stone that grew quickly up the walls, broadening out to form a sturdy organic shell around the entire structure, with simple pruning keeping the windows clear.