While Kate Middleton's engagement ring is one of the most recognizable in the world, thanks to its first owner Princess Diana. However, the future queen isn't always sporting the iconic piece of jewelry. In fact, fans have noticed that Kate has a tendency to ditch the stunning sapphire on a regular basis. However, she's said to have good reasons for leaving the ring at home from time to time.

Jewelry experts at Steven Stone tell Express that Kate's reasoning behind taking off her engagement ring likely boils down to health and safety (via Brides). When Kate is involved in activities that could possibly damage the historic ring, she tends to be seen without it. "Kate typically removes her engagement ring whenever she is taking part in physical activities and sports or when there is a greater risk that the ring could become damaged or lost," one specialist stated.

In addition, Kate's also been seen without her ring for visits to the hospital to avoid any health hazards. It seems logical for the Duchess of Cambridge to keep the ring protected as it's said to be worth about $500,000. Because using products on your hand can cause damage to rings, it appears Kate is doing all that she can to keep Diana's sparkler looking its best.