At the beach. There are a couple reasons for this. The most obvious being if you lose that sucker in the sand or water, it’s a goner. The second and lesser known reason is because of the sand that can wedge itself in the ring setting or under the diamond. And you definitely don’t want to apply sunscreen when you’re wearing your ring, it’ll cloud your stone right up.
Traditionally, white tie attire for women stipulates that a ball gown which exposes decolletage must be worn. Evening length gloves are also required depending on the event, and tiaras may be worn by married women only. In a modern context, white tie for women requires a ball gown.
Taking a shower. Similar to sunscreen, any other soaps, hair or beauty products can cause a cloudy buildup on your stone, or worse, under your stone—which is much harder to clean. Shampoos and body washes are a no-go. The same applies for your favorite scented lotion that you apply post-shower or that hair serum.