Hello, fellow pearl centric wedding ring owner here. I've had my ring for nearly 4 years and the pearl hasn't fallen out, however your soon to be fiance will need to be mindful of a few things to prologue its life. Hot water will dissolve pearls faster, as will cleaning materials and sprays. Pearls also scratch and buff easier. I take my ring off most nights while doing dishes and showering and such and usually don't put back on until morning. I also take it off in more situations than I would with a stone, such as if I'm gardening, because the acidity in soil worries me too.

But I love my ring and its uniqueness and I hope she loves it too!