Princess Beatrice's Diamond Engagement Ring Follows Every Royal Tradition

The queen's eldest granddaughter might have challenged royal rules with her tongue piercing, but Zara Phillips kept things very traditional when she got engaged to rugby star Mike Tindall in 2010.

Zara's ring is a large, cushion-shaped diamond set on a double platinum band packed with more gems. It's a custom design for Zara, and she's worn it proudly ever since.

The couple said "I do" in July 2011, just months after Prince William and Kate Middleton's huge royal wedding, and they now live happily with their two daughters, 5-year-old Mia and baby Lena.