Like everyone else, I love diamonds and pearls! Pearls can make almost anything look classy.
I have some beautiful sapphires (my birthstone) and rubies that I love, but my mama has a killer opal ring (we're talking up to the knuckle!) that I'm not permitted to wear since it's not my birthstone.

She's already selected another October baby that she will leave it to - drat the luck!
I like rose quartz, too - especially mixed with pale jade!