These Mabe`s are handset into thick 18k bezels. This practice is unusual. Mabe` pearls are often set with glue only. Pearls are a calming gem, the heart shape heightens the tranquility. You've no doubt seen some very large pearl flat bottomed earrings. Most of these in the past have been artificial, but with more and more pearls being cultured and the Mabe` process being perfected, we'll be seeing more that are made of real nacre.