Refers to a type of precious stone or metaphorically to something valuable.
La perola que llevaba su collar brillaba intensamente bajo la luz del sol, atrayendo todas las miradas.
The pearl on her necklace sparkled brightly under the sunlight, attracting all eyes.
Encontré una perola en la playa, brillante y perfecta, que parecía haber sido pulida por el mar.
I found a pearl on the beach, shiny and perfect, that seemed to have been polished by the sea.