22 avril 2020
Fine pearls in the 19th century, a rare and natural treasure
Natural Keshi Pearl Rarely found in an oyster, the fine pearl is the result of the nacre's defence mechanism following the intrusion of a foreign object, such as a small stone or a piece of shell, into the bivalve. As the foreign object is rarely spherical, fine pearls are exceptionally round, tending instead to have a baroque shape (with no axis of...