Pearl

A pearl was a valuable shiny object produced by certain varieties of shellfish. A wise saying was sometimes known as a "pearl of wisdom". 

Veltan sex idols were often adorned with pearls. When Kivas Fajo informed Palor Toff that he had four of these artifacts in 2366, Toff asked if they had their pearls intact. Fajo dismissed his question, explaining that Ferengi agents added pearls after the fact to increase the object's value.