All the jewelry should be kept in closed jewelry boxes. It's necessary to keep the jewelry far away from the heating. You should be especially careful with amethysts, colored topazes and pearls. UV-rays make their color less intense.

Don't expose rubies and garnets to sun, too. Gemstone jewelry shouldn't be exposed to temperature drops.

For instance, ruby can completely lose its color when heated.

Never store your jewelry in the bathroom (esp. silver jewelry) because all the metals and stones are afraid of damp.