At over 700 pages long, I go to Strack's book whenever I have a question about pearls.
Baroque is a description of a pearl that is non-symmetrical and shaped irregularly. More importantly, barroque (french spelling) was first used to describe pearls. It was not until the 17c. that Baroque came to mean a form of art and architecture.
But, what exactly is a baroque pearl and are they valuable?