I'm sniffling slightly at these...must be allergies...
-my grandmother's first wedding ring. Yes, you read that correctly; for their 50th anniversary they got new ones and had to have the original ones cut off their fingers. A bit of solder and it was good as new, so she gave it to me as first-born granddaughter. It's a perfect pinky ring and I never take it off.
-DH's grandmother and mother died within a year of each other, and as the only one who was on his way to starting a family we got many of their things. His grandma's cedar chest with treasures within; the flag from his grandfather, a few family records, his mother's journal from when DH was young. His mom also gave me her mom's pearls and I wore them as a bracelet for our wedding.
-when DS was baptized, my FIL surprised us by giving him a rosary that belonged to DH's mom.
-when I met DH, he wore a green whetstone pendant 24/7/365 that he gave me when we started "going steady".
-every year for our anniversary we trek out to a waterfall and find a rock from there to commemorate the occasion. Last week my DH & DS played hookey and headed out to one themselves, after which DS presented me with rocks 'for Mommy'. Oh yeah, those are on my desk forever.