How can I find the lost birthstone earrings that were a gift from my mom?

If you were outside, look for them with a flashlight in the dark,
watching for the reflection from the gemstones. During the day, you
might catch a sparkle if there is bright direct sunlight. If you
are not sure where you might have lost them, have your family and
friends assemble a timeline of all of your activities for the night
— sometimes this can trigger a subconscious recollection of when
and where they became lost.