The Gemological Institute of America (GIA) has a great page called Tips on Caring for Jewelry. They say,
Jewelry is one of our most intimate and cherished accessories. Understanding how to care for and protect your treasured jewelry can make a world of difference in maintaining its beauty and keeping your heirlooms sparkling for generations to come.
Their page covers many subjects including:
- Be careful with light and heat
- Keep your jewelry away from chemicals
- Give treated gems special care
- Use ultrasonic cleaners with caution
- The safest cleaning methods are also the easiest
- Safely store your jewelry