pearl

nouns

a smooth lustrous round structure inside the shell of a clam or oyster; much valued as a jewel
pearl
is a type of (narrower)
a precious or semiprecious stone incorporated into a piece of jewelry
gem, jewel, precious stone
a shade of white the color of bleached bones
bone, ivory, off-white, pearl
is derived from
pearly
a shape that is spherical and small
"he studied the shapes of low-viscosity drops"; "beads of sweat on his forehead"
bead, drop, pearl

verbs

gather pearls, from oysters in the ocean
pearl
is derived from
pearler
is a type of (narrower)
assemble or get together
"gather some stones"; "pull your thoughts together"
collect, garner, gather, pull together