Unique Celebrity Engagement Rings By: Jessie Alcheh February 15, 2019 3:22PM EST 1 of 6 Lady Gaga Michael Buckner/Variety/REX/Shut Lady Gaga’s stunning engagement ring is massive – the huge purple stone is surrounded by smaller (but still large!) diamonds. February 15, 2019, 1:48PM 2 of 6 Kate Middleton shutterstock Kate Middleton’s engagement ring is made up of beautiful blue sapphire, and the piece of jewelry once belonged to Prince William’s mother Princess Diana! Her ring is worth around $500,000 USD. February 15, 2019, 1:48PM 3 of 6 Serena Williams Broadimage/REX/Shutterstock Tennis star Serena Williams’ massive engagement ring is totally a star in its own right! Her $2 million ring from now-husband Alexis Ohanian is stunning and definitely not your typical emerald cut ring! February 15, 2019, 1:48PM 4 of 6 Alison Brie Jim Smeal/REX/Shutterstock Alison Brie’s engagement ring has that vintage-looking inspiration! Her ring is a diamond halo set in yellow gold. Her phenomenal ring is estimated to be worth up to $100,000! February 15, 2019, 1:48PM 5 of 6 Princess Eugenie Jonathan Brady/Pa/REX/Shuttersto We’re big fans of Princess Eugenie’s ring! The ruby diamond sits in the center of multiple diamonds. February 15, 2019, 1:48PM 6 of 6 Katie Maloney Mediapunch/REX/Shutterstock ‘Vanderpump Rules’ Katie Maloney received a gorgeous Kyle Chan champagne-color pearl-shaped diamond ring for her engagement to Tom Schwartz! The ring is estimated to be around $25,000! February 15, 2019, 1:48PM Click to Subscribe to Get Our Free HollywoodLife Daily Newsletter to get the hottest celeb news.