Royal etiquette wiz Myka Meier broke down the jewellery rules, and Middleton is a big-time violator. Apparently, diamonds are not worn during the day, with the exception of marital or religious jewellery
“Other jewels are worn pre-6 pm,” Meier said to news.com.au. “Before 6 pm, you’ll see metallics, gemstones, pearls, sapphires. At night, you’ll see the diamonds come out, and that’s in order to not come across as flashy in your appearance.”
It's a seemingly ridiculous rule, but surprise — Markle is pretty good at following it. She does tend to wear diamonds during royal events (see: the friendship earrings Queen Elizabeth gifted her), but mostly during the evening, not daytime. She does have a favoured diamond bracelet, but Harper's Bazaar Australia reports that it was a gift from her baptism — and religious diamond jewellery is A OK.
Middleton, on the other hand ...
She might want to take etiquette cues from her sister-in-law, for once.
This article originally appeared on InStyle U.S.